Inflatable Liferaft with SOLAS A Pack.....................          \1\  ..................................  .......  .......  .......  .......     100%
Inflatable Liferaft with SOLAS B Pack.....................          \1\  ..................................  .......  .......  .......      \3\  .......
                                                                                100%
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Unless survival craft requirements are determined to be necessary by the cognizant OCMI or a TSMS applicable to the towing vessel.
\2\ A skiff may be substituted for all or part of required equipment if capable of being launched within five minutes under all circumstances (see Sec.
   141.330).
\3\ IBA may be accepted or substituted if the vessel carries a 406 MHz Cat 1 EPIRB meeting 47 CFR Part 80.
\4\ A towing vessel may be exempt from this requirement if it carries a 406 MHz Cat 1 EPIRB meeting 46 CFR 47 Part 80.
\5\ A towing vessel designed for pushing ahead when operating on rivers and canals need not carry survival craft if a TSMS applicable to the towing
  vessel contains procedures for evacuating crewmembers onto the tow or other safe location.
\6\ Not required for towing vessels operating within 1 mile of shore unless determined to be necessary by the cognizant OCMI or a TSMS applicable to the
  towing vessel.

    (2) A towing vessel may continue to use a survival craft, other
than an inflatable liferaft, installed onboard the vessel before
[EFFECTIVE DATE OF FINAL RULE] provided it is of the same type as
required in Table 141.305 of this section, as appropriate for the
vessel type and maintained in good and serviceable condition.
    (3) A towing vessel may continue to use an inflatable liferaft
installed onboard the vessel before [EFFECTIVE DATE OF FINAL RULE],
provided it is equipped with the equipment pack required in Table Sec.
141.305 of this section, as appropriate for the vessel type and
maintained in good and serviceable condition.
    (4) An approved lifeboat may be substituted for any survival craft
required by this section, provided it is arranged and equipped in
accordance with part 199 of this chapter.
    (5) Each towing vessel operating within a limited geographic area
need not carry a survival craft unless it is determined to be necessary
by the cognizant Officer in Charge, Marine Inspection, or a TSMS
applicable to the towing vessel.
    (6) By 2015, no survival craft may be approved unless the craft
ensures that no part of an individual is immersed in water.

Sec.  141.310  Stowage of survival craft.

    Survival craft may be stowed in accordance with the Towing Safety
Management System applicable to the towing vessel, but must, at a
minimum, meet the requirements of Sec.  199.130 of this chapter, as far
as is practicable on existing towing vessels.

Sec.  141.315  Marking of survival craft and stowage locations.

    Survival craft may be marked in accordance with the Towing Safety
Management System applicable to the vessel, but must, at a minimum,
meet the requirements of Sec. Sec.  199.176 and 199.178 of this
chapter.

Sec.  141.320  Inflatable survival craft placards.

    Every towing vessel equipped with an inflatable survival craft must
have approved placards or otherwise post instructions for launching and
inflating inflatable survival craft in conspicuous places near each
inflatable survival craft for the information of persons onboard.

Sec.  141.325  Survival craft equipment.

    (a) Each item of survival craft equipment must be of good quality,
effective for the purpose it is intended to serve, and secured to the
craft.

    (b) Each towing vessel carrying a lifeboat must carry equipment in
accordance with 46 CFR 199.175.
    (c) Each life float and buoyant apparatus must be fitted with a
lifeline, pendants, a painter, and floating electric water light
approved under subpart 161.010 of this chapter.

Sec.  141.330  Other survival craft.

    A skiff may be substituted for all or part of the approved survival
craft as permitted by Table 141.305 (in Sec.  141.305) of this part.
The skiff must meet the following requirements:
    (a) Must be capable of being launched within 5 minutes under all
circumstances.
    (b) Must be of suitable size for all persons onboard;
    (c) Must not exceed the loading specified on the capacity plate;
    (d) Must not contain modifications affecting the buoyancy or
structure of the skiff;
    (e) Must be of suitable design for the vessel's intended service;
approval by the Coast Guard is not required; and
    (f) Must be marked in accordance with 46 CFR part 178 and 46 CFR
199.176.
    (g) By 2015, no survival craft may be approved unless the craft
ensures that no part of an individual is immersed in water.

Sec.  141.335  Personal lifesaving requirements for towing vessels.

    Personal lifesaving requirements are summarized in Table 141.335 of
this section. Equipment requirements are based on the area in which a
vessel is operating, not the route for which it is certificated.

                                                      Table 141.335--Personal Lifesaving Equipment
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                Area of Operation
                              --------------------------------------------------------------------------------------------------------------------------
                                                                           Great Lakes and LBS           Coastwise and Ltd. coastwise
                                    Limited                       ----------------------------------------------------------------------
                                geographic area       Rivers        < 3 miles from    > 3 miles from    < 3 miles from   > 3 miles from       Oceans
                                                                         shore             shore            shore            shore
--------------------------------------------------------------------------------------------------------------------------------------------------------
Lifejackets..................  1 per person....    1 per person onboard. In addition, for vessels with berthing aboard, 1 per watch stander located at
                                                                                each watch station.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Immersion Suits..............  ................  ................                  1 per person onboard. In addition, see 141.350(a)(2).
--------------------------------------------------------------------------------------------------------------------------------------------------------
Work Vests...................     Required to be worn when dispatched from the towing vessel or working without rails and guard on the exterior of the
                                                                                vessel.
--------------------------------------------------------------------------------------------------------------------------------------------------------

Sec.  141.340  Lifejackets.

    Each towing vessel must meet the requirements of 46 CFR 199.70(b)
and (d), except that:
    (a) A lifejacket meeting the requirements of 46 CFR 199.620(c) is
acceptable.
    (b) Child lifejackets are not required.
    (c) For towing vessels with berthing aboard, a sufficient number of
additional lifejackets must be carried so that a lifejacket is
immediately available for persons at each normally manned watch
station.
    (d) If a Towing Safety Management System (TSMS) is applicable to
the towing vessel, the TSMS may provide for an appropriate, alternative
number of lifejackets for the vessel, but there must be at least one
lifejacket for each person onboard. Any TSMS applicable to the towing
vessel must specify the number and location of lifejackets in such a
manner as to facilitate immediate accessibility at normally occupied
spaces including, but not limited to, accommodation spaces and watch
stations.
    (e) The requirements of 46 CFR 199.70(b)(2)(iii) do not apply to
stowage positions for lifejackets, other than lifejackets stowed in a
berthing space or stateroom.
    (f) Each lifejacket container must also be marked in block capital
letters and numbers with the minimum quantity, identity, and, if sizes
other than adult or universal sizes are used on the vessel, the size of
the lifejackets stowed inside the container. The equipment may be
identified in words or with the appropriate symbol from IMO Resolution
A.760(18) incorporated by reference in Sec.  141.120 of this part); and
    (g) Where, due to the particular arrangements of the vessel, the
lifejackets under paragraph (a) of this section could become
inaccessible, any TSMS applicable to the vessel may include suitable
alternative arrangements.
    (h) A lifejacket light described in 46 CFR 199.620(e) may be used
on vessels that are not in international service.

Sec.  141.345  Lifejacket placards.

    (a) Placards containing instructions for the donning and use of the
lifejackets aboard the vessel must be posted in conspicuous places for
all persons onboard.
    (b) If there is no suitable mounting surface, the lifejacket
placards must be available to all persons onboard for familiarization.

Sec.  141.350  Immersion suits.

    (a) General. Except for a towing vessel operating on rivers or in a
limited geographic area, each towing vessel operating north of 32
degrees North latitude or south of 32 degrees South latitude must carry
the number of immersion suits as prescribed in this subsection:
    (1) At least one immersion suit, approved under subpart 160.171 of
this chapter, must be the appropriate size for each person onboard, as
noted in Table 141.335 (in Sec.  141.335) of this part; and
    (2) In addition to the immersion suits required under paragraph
(a)(1) of this section, each watch station, work station, and
industrial work site must have enough immersion suits to equal the
number of persons normally on watch in, or assigned to, the station or
site at one time. However, an immersion suit is not required at a
station or site for a person whose cabin or berthing area (and the
immersion suits stowed in that location) is readily accessible to the
station or site.
    (3) If a TSMS is applicable to the towing vessel, the TSMS may
provide for an appropriate, alternative number of immersion suits for
the vessel, but there must be at least one immersion suit of the
appropriate size for each person onboard if the towing vessel is
required to carry them as prescribed in paragraph (a)(1) of this
section. Any TSMS applicable to the towing vessel must specify the
number and location of the immersion suits in such a manner as to
facilitate immediate accessibility at normally occupied spaces,
including

but not limited to, accommodation spaces and watch stations.
    (b) Attachments and Fittings. Immersion suits must carried on
towing vessels must meet the requirements of 46 CFR 199.70(c) and (d).

Sec.  141.360  Lifebuoys.

    (a) A towing vessel must have one or more lifebuoys as follows:
    (1) A towing vessel less than 26 feet length must carry a minimum
of one lifebuoy of not less than 510 millimeters (20 inches) in
diameter;
    (2) A towing vessel of at least 26 feet, but less than 79 feet, in
length must carry a minimum of three lifebuoys located in positions to
be spread around the vessel where personnel are normally present.
Lifebuoys must be at least 610 millimeters (24 inches) in diameter;
    (3) A towing vessel 79 feet or more in length must carry four
lifebuoys, plus one lifebuoy on each side of the primary operating
station and one lifebuoy at each alternative operating station if the
vessel is so equipped. Lifebuoys must be at least 610 millimeters (24
inches) in diameter; or
    (4) If a Towing Safety Management System (TSMS) is applicable to
the towing vessel, the TSMS may provide for an appropriate, alternative
number of lifebuoys for the vessel. Any TSMS applicable to the towing
vessel must specify the number and location of lifebuoys in such a
manner as to facilitate rapid deployment of ring buoys from exposed
decks, including the pilot house.
    (b) Each lifebuoy on a towing vessel must meet the requirements of
46 CFR 199.70(a), except that:
    (1) Lifebuoys must be orange in color, if on a vessel on an oceans
or coastwise route.
    (2) At least two lifebuoys on a towing vessel greater than 26 feet
must be fitted with a floating electric water light approved under
subpart 161.010 of this chapter. If the towing vessel is limited to
daytime operation, no floating electric water light is required. The
floating electric water light may not be attached to the lifebuoys
fitted with lifelines.
    (3) Each lifebuoy with a floating electric water light must have a
lanyard of at least 910 millimeters (3 feet) in length, but not more
than 1,830 millimeters (6 feet), securing the water light around the
body of the ring buoy.
    (4) Each floating electric water light on a vessel carrying only
one lifebuoy must be attached by the lanyard with a corrosion-resistant
clip to allow the water light to be quickly disconnected from the ring
buoy. The clip must have a strength of at least 22.7 kilograms (50
pounds).

Sec.  141.365  Means for recovery of persons in the water.

    If a Towing Safety Management System (TSMS) is applicable to the
towing vessel, the TSMS must include procedures for the prompt recovery
of a person from the water and for the training of crewmembers
responsible for recovery in effectively implementing such procedures.

Sec.  141.370  Miscellaneous lifesaving requirements for towing
vessels.

    Miscellaneous lifesaving requirements are summarized in Table
141.370 of this section. Equipment requirements are based on the area
in which a towing vessel is operating, not the route for which it is
certificated.

                                                    Table 141.370--Miscellaneous Lifesaving Equipment
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                Area of operation
                              --------------------------------------------------------------------------------------------------------------------------
                                                                           Great Lakes and LBS           Coastwise and Ltd. Coastwise
                                    Limited                       ----------------------------------------------------------------------
                                geographic area       Rivers        < 3 miles from    > 3 miles from    < 3 miles from   > 3 miles from       Oceans
                                                                         shore             shore            shore            shore
--------------------------------------------------------------------------------------------------------------------------------------------------------
Visual Distress Signals (Sec.  3 and 3.........  3 and 3.........  3 and 3.........  6 and 6; or 12    3 and 3........  6 and 6; or 12   6 and 6; or 12
   141.375).                                                                          parachute                          parachute        parachute
                                                                                flares.                            flares.          flares.
EPIRBS (Sec.   141.380)......  ................  ................  ................  Yes.............  ...............  Yes............  Yes, Type
                                                                                Accepted
                                                                                Category 1.
Line Throwing Appliances       ................  ................  ................  ................  ...............  ...............  Yes, 1.
 (Sec.   141.385).
--------------------------------------------------------------------------------------------------------------------------------------------------------

Sec.  141.375  Visual distress signals.

    (a) Operating on oceans and other bodies of water. A towing vessel
operating on oceans, coastwise, limited coastwise, Great Lakes, or
lakes, bays and sounds must carry:
    (1) Six hand red flare distress signals, as approved under 46 CFR
subpart 160.021 or other standard specified by the Coast Guard; and
    (2) Six hand orange smoke distress signals, as approved under 46
CFR 160.037 or other standard specified by the Coast Guard.
    (b) Operating on rivers and other bodies of water. A towing vessel
operating on rivers or western rivers, and not more than 3 nautical
miles from shore upon limited coastwise, great lakes or lakes, or bays
and sounds, must carry:
    (1) Three hand red flare distress signals, as approved under 46 CFR
subpart 160.021 or other standard specified by the Coast Guard.
    (2) Three hand orange smoke distress signals, as approved under 46
CFR subpart 160.037 or other standard specified by the Coast Guard.
    (c) Operating in limited geographic areas. A towing vessel
operating in a limited geographic area must carry:
    (1) Three hand red flare distress signals approved under 46 CFR
subpart 160.021 or other standard specified by the Coast Guard.
    (2) Three hand orange smoke distress signals, as approved under 46
CFR subpart 160.037 or other standard specified by the Coast Guard.
    (d) Substitutions. (1) A rocket parachute flare, as approved under
46 CFR subpart 160.036 or other standard specified by the Coast Guard,
may be substituted for any of the hand red flare distress signals, as
required under paragraph (a) or (b) of this section; or
    (2) One of the following may be substituted for any of the hand
orange smoke distress signals, as required under paragraph (a) or (b)
of this section:
    (i) A rocket parachute flare, as approved under 46 CFR subpart
160.036 or other standard specified by the Coast Guard;
    (ii) A hand red flare distress signal, as approved under 46 CFR
subpart 160.021

or other standard specified by the Coast Guard; or
    (iii) A floating orange smoke distress signal, as approved under 46
CFR subpart 160.022 or other standard specified by the Coast Guard.
    (e) Exemption. A vessel operating in a limited geographic area on a
short run limited to approximately 30 minutes away from the dock is not
required to carry distress flares and smoke signals under this section.
    (f) Stowage. Each pyrotechnic distress signal carried to meet this
section must be stowed in one of the following:
    (1) A portable watertight container carried at the operating
station. Portable watertight containers for pyrotechnic distress
signals must be of a bright color and must be clearly marked in legible
contrasting letters at least 12.7 millimeters (0.5 inches) high with
``DISTRESS SIGNALS''; or
    (2) A pyrotechnic locker secured above the freeboard deck, away
from heat, in the vicinity of the operating station.

Sec.  141.380  Emergency position indicating radiobeacon (EPIRB).

    (a) Each towing vessel operating on oceans, coastwise, limited
coastwise, or beyond 3 nautical miles from shore upon the Great Lakes
must carry a Category 1, 406 MHz satellite Emergency Position
Indicating Radio Beacon (EPIRB) which meets the requirements of 47 CFR
part 80.
    (b) When the towing vessel is underway, the EPIRB must be stowed in
its float-free bracket with the controls set for automatic activation
and be mounted in a manner so that it will float free if the towing
vessel sinks.
    (c) The name of the towing vessel must be marked or painted in
clearly legible letters on each EPIRB, except on an EPIRB in an
inflatable liferaft.
    (d) The owner or managing operator must maintain valid proof of
registration.

Sec.  141.385  Line throwing appliance.

    Each towing vessel operating in oceans service must have a line
throwing appliance approved under subpart 160.040 of this chapter.
    (a) Stowage. The line throwing appliance and its equipment must be
readily accessible for use.
    (b) Additional equipment. The following equipment for the line
throwing appliance is required:
    (1) The equipment on the list provided by the manufacturer with the
approved appliance; and
    (2) An auxiliary line that--
    (i) Is at least 450 meters (1,500 feet) long; and
    (ii) Has a breaking strength of at least 40 kilonewtons (9,000
pounds-force); and
    (iii) Is, if synthetic, of a dark color or certified by the
manufacturer to be resistant to deterioration from ultraviolet light.

PART 142--FIRE PROTECTION

Subpart A--General
Sec.
142.100 Purpose.
142.105 Applicability.
142.110 Definitions.
142.115 Incorporation by reference.
Subpart B--General Requirements for Towing Vessels
142.200 Towing Safety Management System (TSMS).
142.205 Vessels built to alternate standards.
142.210 Alternate arrangements or equipment.
142.215 Approved equipment.
142.220 Fire hazards to be minimized.
142.225 Storage of flammable or combustible products.
142.230 Hand-portable fire extinguishers and semi-portable fire-
extinguishing systems.
142.235 Fixed fire-extinguishing systems.
142.240 Examination, testing, and maintenance.
142.245 Requirements for training crews to respond to fires.
Subpart C--Equipment Requirements
142.300 General.
142.305 Fire-extinguishing equipment required.
142.310 Vessels contracted for prior to November 19, 1952.
142.315 Additional fire-extinguishing equipment requirements.
142.325 Fire pumps, fire mains, and fire hoses.
142.330 Fire detection in the engine room.
142.335 Smoke alarms in berthing spaces.
142.340 Heat detector in galley.
142.345 Firemen's outfit.
142.350 Fire Axe.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904;
33 CFR 1.05; DHS Delegation 0170.1.

Subpart A--General

Sec.  142.100  Purpose.

    This part describes the requirements for fire suppression and
detection equipment and arrangements on towing vessels.

Sec.  142.105  Applicability.

    This part applies to all towing vessels subject to this subchapter.

Sec.  142.110  Definitions.

    The definitions provided in Sec.  136.110 of this subchapter apply
to this part.

Sec.  142.115  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part
with the approval of the Director of the Federal Register under 5 U.S.C
552(a) and 1 CFR part 51. To enforce any edition other than that
specified in this section, the Coast Guard must publish notice of
change in the Federal Register and the material must be available to
the public. All approved material is available for inspection at the
National Archives and Records Administration (NARA). For information on
the availability of this material at NARA, call<PHONE_NUMBER>, or go to:
http://www.archives.gov/federal_register/code_of_federal
regulations/ibr_locations.html. Also, it is available for inspection
at U.S. Coast Guard, Office of Design and Engineering Standards (CG-
521), 2100 Second Street, SW., Washington, DC 20593-0001, and is
available from the sources listed in paragraph (b) of this section.
    (b) The materials approved for incorporation by reference in this
part and the sections affected are:

------------------------------------------------------------------------

------------------------------------------------------------------------
    National Fire Protection Association (NFPA), 1 Batterymarch Park,
                          Quincy, MA 02269-9101
------------------------------------------------------------------------
NFPA 10 (Chapter 7)--Portable Fire Extinguishers, 2007..         142.240
NFPA 1971--Standard on Protective Ensembles for                  142.345
 Structural Fire-Fighting and Proximity Fire-Fighting,
 2007...................................................
------------------------------------------------------------------------
    Underwriters Laboratories Standard, 12 Laboratory Drive, Research
                      Triangle Park, NC 27709-3995
------------------------------------------------------------------------
UL 217--Single and Multiple Station Smoke Detectors.....         142.335
UL 1275--Flammable Storage Cabinet......................         142.225
------------------------------------------------------------------------

Subpart B--General Requirements for Towing Vessels

Sec.  142.200  Towing Safety Management System (TSMS).

    If a Towing Safety Management System (TSMS) is applicable to the
towing vessel, the TSMS must:
    (a) Include policies and procedures to ensure compliance with this
part; and
    (b) Provide objective evidence that documents compliance with the
TSMS.

Sec.  142.205  Vessels built to alternate standards.

    (a) Towing vessels that comply with The International Convention
for the Safety of Life at Sea (SOLAS), 1974, as amended will be deemed
to be in compliance with this part.
    (b) Alternate standards may be used where it can be shown that they
provide an equivalent level of safety and performance.

Sec.  142.210  Alternate arrangements or equipment.

    (a) A towing vessel may comply with the requirements of this
subpart by being equipped with appropriate alternate arrangements or
equipment as permitted by this subpart and documented in the Towing
Safety Management System applicable to the towing vessel.
    (b) The cognizant Officer in Charge, Marine Inspection (OCMI) may
require a towing vessel to carry specialized or additional fire
protection, suppression, or detection equipment if:
    (1) The cognizant OCMI determines that the conditions of the voyage
render the requirements of this part inadequate; or
    (2) The towing vessel is operated in globally remote areas or
severe environments not covered under this part. These areas may
include, but are not limited to, Polar Regions, remote islands, areas
of extreme weather, and other remote areas where timely emergency
assistance cannot be anticipated.

Sec.  142.215  Approved equipment.

    (a) All hand-portable fire extinguishers, semi-portable fire-
extinguishing systems, and fixed fire-extinguishing systems must be of
an approved type.
    (b) Where equipment in this subpart is required to be of an
approved type, such equipment requires the specific approval of the
Coast Guard. A listing of approved equipment and materials may be found
online at http://cgmix.uscg.mil/equip. Each cognizant Officer in
Charge, Marine Inspection (OCMI) may be contacted for information
concerning approved equipment and materials.

Sec.  142.220  Fire hazards to be minimized.

    Each towing vessel must be maintained and operated so as to
minimize fire hazards and to ensure the following:
    (a) All bilges and void spaces are kept free from accumulation of
combustible and flammable materials and liquids;
    (b) Storage areas are kept free from accumulation of combustible
materials insofar as practicable; and
    (c) Internal combustion engine exhaust ducts and galley exhaust
ducts are insulated with noncombustible insulation if less than 450 mm
(18 inches) away from combustibles.

Sec.  142.225  Storage of flammable or combustible products.

    (a) A towing vessel that has paints, coatings, or other flammable
or combustible products onboard must have a designated storage area.
    (b) The storage area may be any room or compartment that is free of
ignition sources. A flammable storage cabinet that satisfies
Underwriters Laboratories Standard (UL) 1275 (incorporated by reference
in Sec.  142.105 of this part) may be used, or other suitable steel
container that provides an equivalent level of protection. If a
flammable storage cabinet or steel container is used, it must be
secured to the vessel so that it does not move.
    (c) A B-II portable fire extinguisher must be located near the
storage area. This is in addition to the portable fire extinguishers
required by Table 142.305 (in Sec.  142.305) of this part.

Sec.  142.230  Hand-portable fire extinguishers and semi-portable fire-
extinguishing systems.

    (a) Hand-portable fire extinguishers and semi-portable fire-
extinguishing systems are classified by a combination letter and Roman
numeral. The letter indicates the type of fire which the unit could be
expected to extinguish, and the Roman numeral indicates the relative
size of the unit.
    (b) For the purpose of this subchapter, all required hand-portable
fire extinguishers and semi-portable fire-extinguishing systems must
include Type B classification, suitable for extinguishing fires
involving flammable liquids, grease, etc.
    (c) The number designations for size run from ``I'' for the
smallest to ``V'' for the largest. Sizes I and II are hand-portable
fire extinguishers; sizes III, IV, and V are semi-portable fire-
extinguishing systems, which must be fitted with hose and nozzle or
other practical means to cover all portions of the space involved.
Examples of the sizes for some of the typical hand-portable fire
extinguishers and semi-portable fire-extinguishing systems appear in
Table 142.230(c) of this section.

                           Table 142.230(c)--Portable and Semi-portable Extinguishers
----------------------------------------------------------------------------------------------------------------
                                                                                Carbon
                                                                   Foam, liters      dioxide,      Dry chemical,
                         Classification                              (gallons)       kilograms       kilograms
                                                                                (pounds)        (pounds)
----------------------------------------------------------------------------------------------------------------
B-I.............................................................     4.75 (1.25)           2 (4)           1 (2)
B-II............................................................       9.5 (2.5)          7 (15)        4.5 (10)
B-III...........................................................         45 (12)         16 (35)          9 (20)
B-IV............................................................         75 (20)         23 (50)       13.5 (30)
B-V.............................................................        125 (33)        45 (100)         23 (50)
----------------------------------------------------------------------------------------------------------------

     (d) All hand-portable fire extinguishers and semi-portable fire-
extinguishing systems must have a permanently attached name plate
giving the name of the item, the rated capacity in gallons, quarts, or
pounds, the name and address of the approving person or firm, and the
manufacturer's identifying mark.

Sec.  142.235  Fixed fire-extinguishing systems.

    (a) When a fixed fire-extinguishing system is installed on a towing
vessel, it must be a type approved by the Coast Guard.
    (b) If the system is a carbon-dioxide type, then it must be
designed and installed in accordance with subpart 76.15 of this
chapter.

Sec.  142.240  Examination, testing, and maintenance.

    (a) All fire suppression and detection equipment and systems on
board a towing vessel must be tested and maintained in accordance with
the attached nameplate, manufacturer's approved design manual or as
otherwise provided in any Towing Safety Management System (TSMS)
applicable to the vessel.
    (b) The records of examinations and tests must be recorded in
accordance with any TSMS applicable to the vessel, the towing vessel
record, or the vessel's official logbook. The following minimum
information is required:
    (1) For tests: the dates when tests and examinations were
performed, the number and/or other identification of each unit tested
and examined, and the name(s) of the person(s) and/or third-party
auditor conducting the tests and examinations; and
    (2) Receipts and other records generated by these tests and
examinations must be retained for at least 1 year after the expiration
of the COI and made available upon request.
    (c) All hand-portable fire extinguishers, semi-portable fire-
extinguishing systems, fire detection systems, and fixed fire-
extinguishing systems, including ventilation, machinery shutdowns, and
dampers onboard the vessel, must be tested or examined at least once
every 12 months, as prescribed in paragraph (d) of this section.
    (d) Tests and examinations. (1) Portable fire extinguishers must be
tested in accordance with the examinations, maintenance procedures, and
hydrostatic pressure tests required by Chapter 7 of NFPA 10, Portable
Fire Extinguishers (incorporated by reference in Sec.  142.105 of this
subchapter), with the frequency as specified by NFPA 10. In addition,
carbon dioxide and Halocarbon portable fire extinguishers must be
refilled when the net content weight loss exceeds that specified for
fixed systems in Table 142.240 of this section.
    (2) Semi-portable and fixed gas fire-extinguishing systems must be
inspected and tested, as required by Table 142.240 of this section, in
addition to the tests required by Sec. Sec.  147.60 and 147.65 of
subchapter N of this chapter.
    (3) Flexible connections and discharge hoses on all semi-portable
extinguishers and fixed gas extinguishing systems must be inspected and
tested in accordance with Sec.  147.65 of this chapter;
    (4) All cylinders containing compressed gas must be tested and
marked in accordance with Sec.  147.60 of this chapter;
    (5) All piping, controls, valves, and alarms must be examined; and
the operation of controls, alarms, and ventilation shutdowns for each
fixed fire-extinguishing system and detecting system must be verified,
to determine that the system is operating properly;
    (6) The fire main system must be charged, and appropriate pressure
must be verified at the most remote and highest outlets;
    (7) All fire hoses must be examined and subjected to a test
pressure equivalent to the maximum service pressure;
    (8) All smoke and fire detection systems, including sensors and
alarms must be tested; and
    (9) All fire hoses which are defective and incapable of repair must
be destroyed.

    Table 142.240--Semi-Portable and Fixed Fire Extinguishing Systems
------------------------------------------------------------------------
            Type system                             Test
------------------------------------------------------------------------
Carbon dioxide....................  Weigh cylinders. Recharge if weight
                                     loss exceeds 10 percent of weight
                                     of charge. Test time delays,
                                     alarms, and ventilation shutdowns
                                     with carbon dioxide, nitrogen, or
                                     other nonflammable gas as stated in
                                     the system manufacturer's
                                     instruction manual. Examine hoses
                                     and nozzles to be sure they are
                                     clean.
Halon.............................  Weigh cylinders. Recharge if weight
                                     loss exceeds 5 percent of weight of
                                     charge. If the system has a
                                     pressure gauge, recharge if
                                     pressure loss (adjusted for
                                     temperature) exceeds 10 percent.
                                     Test time delays, alarms, and
                                     ventilation shutdowns with carbon
                                     dioxide, nitrogen, or other
                                     nonflammable gasses stated in the
                                     system manufacturer's instruction
                                     manual. Examine hoses and nozzles
                                     to be sure they are clean.
Dry Chemical (cartridge operated).  Examine pressure cartridge and
                                     replace if end is punctured or if
                                     determined to have leaked or is in
                                     an unsuitable condition. Examine
                                     hose and nozzle to see if they are
                                     clear. Insert charged cartridge.
                                     Ensure dry chemical is free flowing
                                     (not caked) and extinguisher
                                     contains full charge.
Dry chemical (stored pressure)....  See that pressure gauge is within
                                     operating range. If not, or if the
                                     seal is broken, weigh or otherwise
                                     determine that extinguisher is
                                     fully charged with dry chemical.
                                     Recharge if pressure is low or dry
                                     chemical is needed.
Foam (stored pressure)............  See that pressure gauge, if so
                                     equipped, is within the operating
                                     range. If not, or if the seal is
                                     broken, weigh or otherwise
                                     determine that extinguisher is
                                     fully charged with foam. Recharge
                                     if pressure is low or foam is
                                     needed. Replace premixed agent
                                     every 3 years.
Halocarbon........................  Recharge or replace if weight loss
                                     exceeds 5 percent of weight of
                                     charge, or if pressure loss exceeds
                                     10 percent of specified gauge
                                     pressure, adjusted for temperature.
Inert gas.........................  Recharge or replace if cylinder
                                     pressure loss exceeds 5 percent of
                                     specified gauge pressure, adjusted
                                     for temperature.
Water mist........................  Maintain system in accordance with
                                     the maintenance instructions in the
                                     system manufacturer's design,
                                     installation, operation, and
                                     maintenance manual.
------------------------------------------------------------------------

Sec.  142.245  Requirements for training crews to respond to fires.

    (a) Drills and instruction. The master of a towing vessel must
ensure that each crewmember participates in fire fighting drills and
receives instruction at least once each month. The instruction may
coincide with the drills, but is not required. All crewmembers must be
familiar with their fire fighting duties, and, specifically how to:
    (1) Fight a fire in the engine room and elsewhere onboard the
towing vessel, including how to--
    (i) Operate all of the fire-extinguishing equipment onboard the
towing vessel;
    (ii) Stop any mechanical ventilation system for the engine room and
effectively seal all natural openings to the space to prevent leakage
of the extinguishing agent; and
    (iii) Operate the fuel shut-off(s) for the engine room.
    (2) Activate the general alarm.

    (3) Report inoperative alarm systems and fire detection systems;
and
    (4) Don a fireman's outfit and a self-contained breathing
apparatus, if the vessel is so equipped.
    (b) Alternative form of instruction. Video training, followed by a
discussion led by someone familiar with the contingencies listed in
paragraph (a) of this section, is an acceptable, alternative form of
instruction. This instruction may occur either onboard or off the
towing vessel.
    (c) Participation in drills. Drills must take place onboard the
towing vessel as if there were an actual emergency. They must include:
    (1) Participation by all crewmembers;
    (2) Breaking out and using, or simulating the use of, emergency
equipment;
    (3) Testing of all alarm and detection systems; and
    (4) Putting on protective clothing by at least one person, if the
towing vessel is so equipped.
    (d) Safety orientation. The master must ensure that each crewmember
who has not participated in the drills required by paragraph (a) of
this section and received the instruction required by that paragraph
receives a safety orientation within 24 hours of reporting for duty.
The safety orientation must cover the particular contingencies listed
in paragraph (a) of this section.
    (e) Recording. Training must be recorded in accordance with the
provisions of part 140 of this subchapter.

Subpart C--Equipment Requirements

Sec.  142.300  General.

    Excepted vessels, as defined in Sec.  136.110 of this subchapter,
need not comply with the provisions of Sec. Sec.  142.315 through
142.340 of this subpart.

Sec.  142.305  Fire-extinguishing equipment required.

    (a) Towing vessels of 65 feet or less in length must carry at least
the minimum number of hand-portable fire extinguishers set forth in
Table 142.305(a) of this section.

           Table 142.305(a)--Hand-Portable Fire Extinguishers
------------------------------------------------------------------------
                                            Minimum number of B-I hand
                                            portable fire extinguishers
                                                   required \1\
                                         -------------------------------
              Length, feet                No fixed fire-    Fixed fire-
                                           extinguishing   extinguishing
                                             system in       system in
                                             machinery       machinery
                                               space           space
------------------------------------------------------------------------
Under 16................................               1               0
16 and over, but under 26 \2\...........               1               0
26 and over, but under 40...............               2               1
40 and over, but not over 65............               3               2
------------------------------------------------------------------------
\1\ One B-II hand-portable fire extinguisher may be substituted for two
  B-I hand portable fire extinguishers.
\2\ See Sec.   136.105 Applicability concerning vessels under 26 feet.

    (b)(1) Towing vessels of more than 65 feet in length must carry at
least the minimum number of hand portable fire extinguishers set forth
in Table 142.305(b)(1) of this section.

                           Table 142.305(b)(1)
------------------------------------------------------------------------
                    Gross tonnage--                      Minimum number
-------------------------------------------------------   of B-II hand
                                                          portable fire
             Over                      Not over           extinguishers
------------------------------------------------------------------------
                                50....................                 1
50............................  100...................                 2
100...........................  500...................                 3
500...........................  1,000.................                 6
1,000.........................  ......................                 8
------------------------------------------------------------------------

     (2) In addition to the hand portable extinguishers required by
paragraph (b)(1) of this section, one Type B-II hand-portable fire
extinguisher must be fitted in the engine room for each 1,000 brake
horsepower of the main engines or fraction thereof. A towing vessel is
not required to carry more than six such extinguishers.

Sec.  142.310  Vessels contracted for prior to November 19, 1952.

    (a) Towing vessels contracted for construction prior to November
19, 1952, must meet the applicable provisions of this part concerning
the number and general type of equipment required.
    (b) Existing lists of equipment and installations previously
approved, but not meeting the applicable requirements for type
approval, may be continued in service so long as they are in good
condition.
    (c) All new installations and replacements must meet the
requirements of this part.

Sec.  142.315  Additional fire-extinguishing equipment requirements.

    (a) A towing vessel that is:
    (1) Certificated for rivers, lakes, bays, and sounds; or
    (2) Certificated for limited coastwise, coastwise, oceans or waters
beyond 3 nautical miles from shore on the Great Lakes, whose contract
for construction was executed prior to August 27, 2003, must have:
    (i) The minimum number of hand-portable fire extinguishers required
by Sec.  142.305 of this part; and

    (ii) An approved B-V semi-portable fire-extinguishing system to
protect the engine room; or
    (iii) A fixed fire-extinguishing system installed to protect the
engine room.
    (b) A towing vessel whose contract for construction was executed on
or after August 27, 2003, and is certificated for limited coastwise,
coastwise, oceans, or beyond 3 nautical miles from shore on the Great
Lakes, must be equipped with:
    (1) The minimum number of hand-portable fire extinguishers required
by Sec.  142.305 of this part; and
    (2) An approved B-V semi-portable fire-extinguishing system to
protect the engine room; and
    (3) A fixed fire-extinguishing system installed to protect the
engine room.
    (4) Paragraph (b) of this section does not apply to any towing
vessel pushing a barge ahead or hauling a barge alongside when the
barge's coastwise, limited coastwise, or Great Lakes route is
restricted, as indicated on its Certificate of Inspection, so that the
barge may operate ``in fair weather only, within 12 miles of shore'' or
with words to that effect.

Sec.  142.325  Fire pumps, fire mains, and fire hoses.

    Each towing vessel must have either a self-priming, power-driven,
fixed fire pump, a fire main, and hoses and nozzles in accordance with
paragraphs (a) through (d) of this section; or a portable pump, and
hoses and nozzles, in accordance with paragraphs (e) and (f) of this
section.
    (a) A fixed fire pump must be capable of:
    (1) Delivering water simultaneously from the two highest hydrants,
or from both branches of the fitting if the highest hydrant has a
Siamese fitting, at a pitot-tube pressure of at least 344 kilopascals
(kPa), 50 pounds per square inch (psi), and a flow rate of at least 300
liters per minute (LPM), 80 gallons per minute (gpm), and
    (2) Being energized remotely from a safe place outside the engine
room and from the pump.
    (b) All suction valves necessary for the operation of the fire main
must be kept in the open position or capable of operation from the same
place where the remote fire pump control is located.
    (c) The fire main must have a sufficient number of fire hydrants
with attached hose to reach any part of the machinery space using a
single length of fire hose.
    (d) The hose must be lined commercial fire hose, at least 40
millimeters (1.5 inches) in diameter, 15 meters (50 feet) in length,
and fitted with a nozzle made of corrosion-resistant material capable
of providing a solid stream and a spray pattern.
    (e) The portable fire pump must be self-priming and power-driven,
with--
    (1) A minimum capacity of at least 300 LPM (80 gpm) at a discharge
gauge pressure of not less than 414 kPa (60 psi), measured at the pump
discharge;
    (2) A sufficient amount of lined commercial fire-hose at least 40
mm (1.5 inches) in diameter and 15 meters (50 feet) in length,
immediately available to attach to it so that a stream of water will
reach any part of the vessel; and
    (3) A nozzle made of corrosion-resistant material capable of
providing a solid stream and a spray pattern.
    (f) The pump must be stowed with its hose and nozzle outside of the
machinery space.

Sec.  142.330  Fire detection in the engine room.

    Each towing vessel must have a fire-detection system installed to
detect engine room fires. A towing vessel whose construction was
contracted for prior to January 18, 2000, may use an existing engine
room monitoring system (with fire-detection capability) instead of a
fire detection system, if the monitoring system is operable and
complies with this section. The owner or managing operator must ensure
that:
    (a) Each detector, control panel, and fire alarm are approved under
46 CFR 161.002 or listed by an independent testing laboratory; except
that, for an existing engine room monitoring system (with fire-
detection capability), each detector must be listed by an independent
testing laboratory.
    (b) The system is installed, tested, and maintained in accordance
with the manufacturer's design manual;
    (c) The system is arranged and installed so a fire in the engine
room automatically sets off alarms on a control panel at the primary
operating station;
    (d) The control panel includes:
    (1) A power available light;
    (2) Both an audible alarm to notify crew at the operating station
of a fire, and visual alarms to identify the zone or zones of origin of
the fire;
    (3) A means to silence the audible alarm while maintaining
indication by the visual alarms;
    (4) A circuit-fault detector test-switch; and
    (5) Labels for all switches and indicator lights, identifying their
functions.
    (e) The system draws power from two sources; switchover from the
primary source to the secondary source may be either manual or
automatic;
    (f) The system serves no other purpose, unless it is an engine room
monitoring system (with fire-detection capability) installed on a
vessel whose contract for construction occurred prior to January 18,
2000; and
    (g) The system is certified by a Registered Professional Engineer,
or by a recognized classification society (under 46 CFR part 8), to
comply with paragraphs (a) through (f) of this section.

Sec.  142.335  Smoke alarms in berthing spaces.

    Each towing vessel must be equipped with a means to detect smoke in
the berthing spaces and lounges that alerts individuals in those
spaces. This may be accomplished via an installed detection system or
by using individual battery-operated detectors meeting Underwriters
Laboratories Standard 217 (incorporated by reference in Sec.  142.105
of this subchapter). Detection systems or individual detectors must be
kept operational at all times when the crew is onboard the towing
vessel.

Sec.  142.340  Heat detector in galley.

    Each new towing vessel equipped with a galley must have a heat
detection system, which sounds an audible alarm at the operating
station.

Sec.  142.345  Firemen's outfit.

    (a) Each towing vessel 79 feet or more in length operating on
oceans and coastwise routes that does not have an installed fixed fire-
extinguishing system must have:
    (1) At least two firemen's outfits that meet National Fire
Protection Association (NFPA) 1971, Protective Ensemble for Structural
Fire Fighting (incorporated by reference in Sec.  142.115 of this
subchapter).
    (2) Two self-contained breathing apparatus of the pressure demand,
open circuit type that are approved by the Mine Safety and Health
Administration (MSHA) and by the National Institute for Occupational
Safety and Health (NIOSH), under 42 CFR part 84. The breathing
apparatus must have a minimum 30-minute air supply and full facepiece.
    (b) [Reserved].

Sec.  142.350  Fire axe.

    Each towing vessel must be equipped with at least one fire axe that
is readily accessible for use from the exterior of the vessel.

PART 143--MACHINERY AND ELECTRICAL SYSTEMS AND EQUIPMENT

Subpart A--General
Sec.
143.100 Purpose.
143.105 Applicability.

143.110 Organization of this part.
143.115 Definitions.
143.120 Incorporation by reference.
Subpart B--Requirements for All Towing Vessels
143.200 Applicability.
143.205 Towing Safety Management System (TSMS).
143.210 Vessels built to class.
143.215 Alternate design considerations.
143.220 General.
143.225 [Reserved].
143.230 Guards for exposed hazards.
143.235 Machinery space fire prevention.
143.240 Control and monitoring requirements.
143.245 Alarms and monitoring.
143.250 General alarms.
143.255 Communication requirements.
143.260 Readiness and testing.
143.270 System isolation and markings.
143.275 Fuel system requirements for towing vessels.
143.280 Fuel shutoff requirements.
143.285 Additional fuel system requirements for towing vessels built
after January 18, 2000.
143.290 Piping systems and tanks.
143.295 Bilge pumps or other dewatering capability.
143.300 Pressure Vessels.
143.305 Electrical systems, general.
143.310 Shipboard lighting.
143.315 Navigation lights.
Subpart C--Deferred Requirements for Existing Towing Vessels
143.320 Applicability.
143.325 Pilothouse alerter system.
143.330 Towing machinery.
143.335 Remote shutdowns.
143.340 Electrical power sources, generators, and motors.
143.345 Electrical distribution panels and switchboards.
143.350 Electrical overcurrent protection other than generators and
motors.
143.355 Electrical grounding and ground detection.
143.360 Electrical conductors, connections, and equipment.
Subpart D--Requirements for Towing Vessels That Tow Oil or Hazardous
Materials in Bulk
143.400 General applicability.
143.405 General requirements for propulsion, steering, and related
controls.
143.410 Propulsor redundancy.
143.420 Vessels with one propulsor.
143.430 Alternative standards.
143.435 Demonstration of compliance.
Subpart E--New Towing Vessels
143.500 Applicability.
143.505 Standards to be used.
143.510 Plan approval.
143.515 Towing vessels built to American Bureau of Shipping rules.
143.520 Towing vessels built to American Boat and Yacht Council
(ABYC) standards.
143.525 Towing vessels not built to American Bureau of Shipping
(ABS) rules or American Boat and Yacht Council (ABYC) standards.
143.530 [Reserved].
143.532 New towing vessels that move barges carrying oil or
hazardous materials in bulk.
143.535 Pumps, pipes, valves, and fittings for essential systems.
143.540 Pressure vessels.
143.545 Steering systems.
143.550 Electrical installations.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904;
33 CFR 1.05; DHS Delegation 0170.1.

Subpart A--General

Sec.  143.100  Purpose.

    This part contains requirements for the design, installation, and
operation of primary and auxiliary machinery and electrical systems and
equipment on towing vessels.

Sec.  143.105  Applicability.

    This part applies to all towing vessels subject to this subchapter.

Sec.  143.110  Organization of this part.

    (a) Certain sections in this part contain functional requirements.
Functional requirements describe the desired objective of the
regulation. A towing vessel must meet the applicable functional
requirements.
    (b) Certain sections may also contain a prescriptive option to meet
the functional requirements. A towing vessel that meets the
prescriptive option will have complied with the functional
requirements.
    (c) If an owner or managing operator chooses to meet the functional
requirement through means other than the prescriptive option, the means
must be accepted by the cognizant OCMI or an approved third-party
organization and documented in any TSMS applicable to the vessel.

Sec.  143.115  Definitions.

    The definitions provided in Sec.  136.110 of this subchapter apply
to this part.

Sec.  143.120  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part
with the approval of the Director of the Federal Register in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51. To enforce an edition other
than that specified in paragraph (b) of this section, the Coast Guard
must publish notice of the change in the Federal Register and the
material must be available for inspection. All approved material is
available for inspection at the National Archives and Records
Administration (NARA). For information on the availability of this
material at NARA, call<PHONE_NUMBER>, or go to: http://www.archives.gov/federal_register/code_of_federal regulations/ibr_locations.html.
Also, all materials are available at the U.S. Coast Guard, Office of
Design and Engineering Standards (CG-521), 2100 Second Street SW.,
Washington, DC 20593-0001, or from the sources indicated in this
section.
    (b) The material approved for incorporation by reference in this
part and the sections affected are:

------------------------------------------------------------------------

----------------------------------------------------
    American Boat and Yacht Council (ABYC), 3069
   Solomons Island Road, Edgewater, MD 21037-1416
------------------------------------------------------------------------
E-11--AC & DC        143.520
 Electrical Systems
 on Boats, 2003
H-2--Ventilation of  143.520
 Boats Using
 Gasoline, 2000
H-22--Electric       143.520
 Bilge Pump
 Systems, 2005
H-24 -- Gasoline     143.520
 Fuel Systems, 2007
H-25--Portable Fuel  143.285, 143.520
 Systems for
 Flammable Liquids,
      2003
H-32--Ventilation    143.520
 of Boats Using
 Diesel Fuel, 2004
H-33--Diesel Fuel    143.520
 Systems, 2005
P-1--Installation    143.520
 of Exhaust Systems
 for Propulsion and
 Auxiliary Engines,
      2002
P-4--Marine Inboard  143.520
 Engines and
 Transmissions,
      2004
------------------------------------------------------------------------
 American Bureau of Shipping (ABS), ABS Plaza, 16855
         Northchase Drive, Houston, TX 77060
------------------------------------------------------------------------
Rules for Building   143,210, 143.430, 143.515,
 and Classing Steel   143.535, 143.545, 143.550
 Vessels for
 Service on Rivers
 and Intracoastal
 Waterways, 2007

Rules for Building   143.210, 143.340, 143.430,
 and Classing Steel   143.515, 143.535, 143.540,
 Vessels Under 90     143.545, 143.550
 Meters (295 Feet)
 in Length, 2006
------------------------------------------------------------------------
   International Organization for Standardization
 (ISO), 1 rue de varembe', Case postale 56, CH-1211
               Geneve 20, Switzerland
------------------------------------------------------------------------
ISO Standard 14726:  143.270
 2008 Ships and
 marine technology--
 Identification
 colours for the
 content of piping
 systems, 2008
------------------------------------------------------------------------
   National Fire Protection Association (NFPA), 1
      Batterymarch Park, Quincy, MA 02269-9101
------------------------------------------------------------------------
NFPA 302-1998--Fire  143.285
 Protection
 Standard for
 Pleasure, and
 Commercial Motor
 Craft, 1998
NFPA 70-2002--       143.340, 143.350
 National Electric
 Code (NEC)
 articles 240, 430,
 and 450, 2002
------------------------------------------------------------------------
     Society of Automotive Engineers (SAE), 400
    Commonwealth Drive, Warrendale, PA 15096-0001
------------------------------------------------------------------------
SAE J1475-1996--     143.285
 Hydraulic Hose
 Fitting for Marine
 Applications, 1996
SAE J1942-2005--     143.285
 Hose and Hose
 Assemblies for
    Marine
 Applications, 2005
------------------------------------------------------------------------
   Underwriters Laboratories, 12 Laboratory Drive,
        Research Triangle Park, NC 27709-3995
------------------------------------------------------------------------
UL 1104--Standards   143.315
 for Marine
 Navigation Lights,
      1998
------------------------------------------------------------------------

Subpart B--Requirements for All Towing Vessels

Sec.  143.200  Applicability.

    (a) This subpart applies to all towing vessels subject to this
subchapter.
    (b) Where indicated, excepted towing vessels as defined in Sec.
136.110 need not comply with the provisions of this part.

Sec.  143.205  Towing Safety Management System (TSMS).

    If a Towing Safety Management System (TSMS) is applicable to the
towing vessel, the TSMS must:
    (a) Include policies and procedures to ensure compliance with this
part; and
    (b) Provide objective evidence that documents compliance with the
TSMS.

Sec.  143.210  Vessels built to class.

    (a) Except as noted in paragraph (b) of this section:
    (1) A towing vessel classed by the American Bureau of Shipping
(ABS) (incorporated by reference in Sec.  143.120 of this part) in
accordance with their rules, and as appropriate for the intended
service and routes, is considered in compliance with the mechanical and
electrical standards of this part.
    (2) A towing vessel built and equipped to conform to ABS rules
(incorporated by reference in Sec.  143.120 of this part) appropriate
for the intended service and routes, but not currently classed, may be
deemed to be in compliance with this part, provided that the vessel
continues to conform to ABS rules.
    (b) Additional requirements. A towing vessel that complies with
paragraph (a) of this section must also comply with the following
requirements:
    (1) A towing vessel that moves oil or hazardous materials in bulk
must meet the class requirements described in subpart D of this part.
    (2) A towing vessel must meet the potable water requirements in
Sec.  143.225 of this part.
    (3) A towing vessel must meet the pilothouse alerter requirements
in Sec.  143.325 of this part.
    (4) A towing vessel must meet the towing machinery requirements of
Sec.  143.330 of this part.

Sec.  143.215  Alternate design considerations.

    Machinery or electrical equipment or systems of a novel design,
unusual form, or special materials which cannot be reviewed or approved
in accordance with this part, may be approved by the Commanding
Officer, Marine Safety Center. It must be shown by systematic analysis,
based on engineering principles, that the machinery or electrical
equipment or system provides an equivalent level of safety. The owner
shall submit detailed plans, material component specifications, and
design criteria, including the expected vessel service and operating
environment, to the Marine Safety Center.

Sec.  143.220  General.

    (a) Machinery and electrical systems must be designed and
maintained to provide for safe operation of the vessel and safety of
persons onboard under normal and emergency conditions.
    (b) The crew of each towing vessel must be able to demonstrate the
ability to operate primary and auxiliary machinery and electrical
systems under normal and emergency conditions. This includes, but is
not limited to, responses to alarms and operation of propulsion and
steering in the event of failure.
    (c) Propulsion machinery, including main engines, reduction gears,
shafting, bearings, and electrical equipment and systems, must:
    (1) Be maintained to ensure proper operation;
    (2) Be suitable for route and service; and
    (3) Have suitable propulsion controls to provide the operator full
control at the primary operating station.
    (d) Repairs and minor alterations to existing towing vessels must
be made in accordance with this part. New installations on or after
[date after a final rule takes effect] that are not ``replacements in
kind'' on an existing towing vessel must comply with subparts C and D
of this part, if applicable.

Sec.  143.225  [Reserved]

Sec.  143.230  Guards for exposed hazards.

    Exposed hazards, such as gears or rotating machinery, must be
properly protected by a cover, guard, or rail.

Sec.  143.235  Machinery space fire prevention.

    (a) All seals and gaskets must be properly maintained to prevent
flammable liquid leaks in the machinery space.
    (b) Machinery space bilges must be kept free of excessive
accumulation of oil.
    (c) Piping and machinery components that exceed 65.5 [deg]C (150
[deg]F), including fittings, flanges, valves, exhaust manifolds, and
turbochargers, must be insulated. Measures must be in place to prevent
flammable liquid piping leaks from coming into contact with these
components.
    (d) Flammable and combustible materials must not be stored in
machinery spaces, unless they are stored in a suitable container that
meets the requirements of Sec.  142.225 of this subchapter.

Sec.  143.240  Control and monitoring requirements.

    (a) Each towing vessel must have a means to monitor and control the
amount of thrust, rudder angle, and (if applicable), direction of
thrust at the primary operating station.
    (b) Each towing vessel equipped with rudder(s) must have a means to
monitor and control the position of the rudder(s) at the primary
operating station.

Sec.  143.245  Alarms and monitoring.

    (a) Each towing vessel must have a reliable means to provide
notification when an emergency condition exists or an essential system
develops problems that require attention. The following must be
equipped with alarms:
    (1) Main engine lubricating oil pressure;
    (2) Main engine cooling water temperature;
    (3) Main engine fuel oil pressure;
    (4) Auxiliary generator engine lubricating oil pressure;
    (5) Auxiliary generator engine cooling water temperature;
    (6) Auxiliary generator fuel pressure;
    (7) Bilge high levels;
    (8) Hydraulic steering fluid levels, if applicable; and
    (9) Low fuel level, if fitted with a day tank (see Sec.  143.275).
    (b) Alarms must:
    (1) Be visible and audible at the operating station;
    (2) Function when primary electrical power is lost;
    (3) Have a means to test actuation at the operating station;
    (4) Continue until they are acknowledged; and
    (5) Not interfere with night vision at the operating station.
    (c) The following systems must be equipped with gauges visible at
the operating station:
    (1) Main engine lubricating oil pressure;
    (2) Main engine cooling water temperature;
    (3) Auxiliary generator engine lubricating oil pressure;
    (4) Auxiliary generator engine cooling water temperature; and
    (5) Hydraulic steering fluid pressure, if the vessel is equipped
with hydraulic steering systems.
    (d) On excepted towing vessels, as defined in Sec.  136.110 of this
subchapter, the alarms required by this section may be located in the
engine room, provided that an audible summary alarm is provided in the
pilothouse and that communication exits between the pilothouse and the
engine room that functions when ship service power is not available.

Sec.  143.250  General alarms.

    (a) Applicability. This section applies to all towing vessels that
are not an excepted vessel as defined in Sec.  136.110 of this
subchapter.
    (b) Purpose. To provide a reliable and effective means of notifying
all persons onboard the towing vessel of an emergency.
    (c) Each towing vessel must be fitted with a general alarm that:
    (1) Has a contact maker at the operating station that can notify
persons onboard in the event of an emergency;
    (2) Is capable of notifying persons in any accommodation, work
space, and the engine room;
    (3) Has installed, in the engine room and any other area where
background noise makes a general alarm hard to hear, a supplemental
flashing red light that is identified with a sign that reads:
``Attention General Alarm--When Alarm Sounds or Flashes Go to Your
Station''; and
    (4) Is tested at least once each week.
    (d) A public-address (PA) system or other means of alerting all
persons on the towing vessel may be used in lieu of the general alarm
in paragraph (c) of this section if the system:
    (1) Is capable of notifying persons in any accommodation, work
space, and the engine room;
    (2) Complies with paragraph (c)(3) of this section;
    (3) Can be activated from the operating station; and
    (4) Is tested at least once each week.

Sec.  143.255  Communication requirements.

    (a) Applicability. This section applies to all towing vessels
subject to this subchapter that are not an excepted towing vessel as
defined in Sec.  136.110 of this subchapter.
    (b) Communication system. Each towing vessel must be fitted with a
communication system between the pilothouse and the engine room that:
    (1) Consists of either fixed or portable equipment, such as a
sound-powered telephone, portable radios, or other reliable method of
voice communication, with a main or reserve power supply that is
independent of the electrical system;
    (2) Provides two-way voice communication and calling between the
pilothouse and either the engine room or a location immediately
adjacent to an exit from the engine room.
    (c) Exceptions. Towing vessels with more than one propulsion unit
and independent pilothouse control for all engines are not required to
have internal communication systems.
    (d) Direct voice communication. When the pilothouse engine controls
and the access to the engine room are within 3 meters (10 feet) of each
other and allow unobstructed visible contact between them, direct voice
communication is acceptable instead of a communication system.

Sec.  143.260  Readiness and testing.

    (a) Functional requirements. Essential systems or equipment must be
regularly tested and examined. If a component is found unsatisfactory,
it must be repaired or replaced. Test and examination procedures must
be in accordance with manufacturer's instructions (if available) and
the vessel's Towing Safety Management System, if the vessel has a TSMS.
Tests and examinations must verify that the system or equipment
functions as designed.
    (b) Prescriptive option. The towing vessel must perform the tests
in Table 143.260(c) of this section. The tests required by this section
must be recorded in accordance with part 140 of this subchapter.

             Table 143.260(c)--Required Tests and Frequency
------------------------------------------------------------------------
              Tests of:                            Frequency
------------------------------------------------------------------------
Propulsion controls; ahead and astern  Before the vessel embarks on a
 at the operating station.              trip or voyage of more than 24
                                        hours or when each new master
                                        takes command.
Steering controls at the operating     Before the vessel embarks on a
 station.                               trip or voyage of more than 24
                                        hours or when each new master
                                        takes command.
Pilothouse alerter system required by  Weekly.
 Sec.   143.325 of this part, as
 applicable.
All alternate steering and propulsion  Weekly.
 controls including those required by
 subpart D of this part (if
 applicable).

Alarm actuation circuits for alarms    Weekly.
 required by Sec.   143.245 of this
 part, and if applicable, subpart D
 of this part.
Emergency communication, including     Weekly.
 any required by subpart D if
 applicable.
General alarm if the vessel is so      Weekly.
 equipped.
Emergency lighting and power if the    At least once every 3 months.
 vessel is so equipped.
Storage batteries if the vessel is so  At least once every 3 months.
 equipped, for emergency lighting and
 power.
Alarm setpoints......................  Annually using methods described
                                        in 46 CFR 61.40-10.
Pressure vessel safety valves........  Annually.
All other essential systems..........  At least once every 3 months.
------------------------------------------------------------------------

Sec.  143.270  System isolation and markings.

    Electrical equipment, piping for flammable liquid, seawater
cooling, or firefighting systems must be provided with isolation
devices and markings as follows:
    (a) Electrical equipment must be provided with circuit isolation
and must be marked as described in Sec.  143.305 of this part;
    (b) Electrical panels or other enclosures containing more than one
source of power must be fitted with a sign warning persons of this
condition and identifying where to secure all sources;
    (c) Piping for flammable liquid, seawater cooling, or firefighting
systems must be fitted with isolation valves that are clearly marked by
labeling or color coding that enables the crew to identify its
function; and
    (d) Any piping system that penetrates the hull below the waterline
must be fitted with efficient and accessible means, located as close to
the hull penetrations as is practicable, for preventing the accidental
admission of water into the vessel either through such pipes or in the
event of a fracture of such pipe. The valve must be clearly marked by
labeling or color coding that enables the crew to identify its
function.
    (e) Color coding required by this section may be met by complying
with coding standards contained in International Organization for
Standardization (ISO) standard 14726 (incorporated by reference in
Sec.  143.120 of this part), or in accordance with the Towing Safety
Management System applicable to the vessel.

Sec.  143.275  Fuel system requirements for towing vessels.

    (a) Fuel systems for the towing vessel, main engine propulsion, and
auxiliary generator systems must be maintained to ensure proper
operation of the system.
    (b) A continuous supply of clean fuel must be provided to all
engines necessary for towing vessel control including the main
propulsion engines and auxiliary generator engines.
    (c) The fuel system must include filters or centrifuge. Where
filters are used:
    (1) A supply of spare fuel filters must be provided onboard; and
    (2) Fuel filters must be examined and replaced in accordance with
manufacturer's requirements.
    (d) Towing vessels equipped with a day tank must be equipped with a
low fuel level alarm that meets the requirements of Sec.  143.245 of
this part.

Sec.  143.280  Fuel shutoff requirements.

    (a) Applicability. This section applies to all towing vessels
subject to this subchapter that are not excepted towing vessels, as
defined in Sec.  136.110 of this subchapter.
    (b) To stop the flow of fuel in the event of a break in the fuel
line, a positive, remote fuel shutoff valve must be fitted on any fuel
line that supplies fuel directly to an engine or generator prime mover.
    (c) The valve must be near the source of supply (for instance, at
the day tank, storage tank, or fuel-distribution manifold).
    (d) The valve(s) must be operable from a safe place outside the
space where the valve is installed.
    (e) Each remote valve control should be marked in clearly legible
letters, at least 25 millimeters (1 inch) high, indicating the purpose
of the valve and the way to operate it.

Sec.  143.285  Additional fuel system requirements for towing vessels
built after January 18, 2000.

    (a) Applicability. This section applies to all towing vessels
subject to this subchapter that are not excepted towing vessels, as
defined in Sec.  136.110 of this subchapter. Except for the components
of an outboard engine or of a portable bilge or fire pump, each fuel
system installed onboard the towing vessel must comply with this
section.
    (b) Portable fuel systems. The towing vessel must not incorporate
or carry portable fuel systems, including portable tanks and related
fuel lines and accessories, except when used for outboard engines or
when permanently attached to portable equipment such as portable bilge
or fire pumps. The design, construction, and stowage of portable tanks
and related fuel lines and accessories must comply with the American
Boat and Yacht Council (ABYC) H-25 (incorporated by reference in Sec.
143.120 of this subchapter).
    (c) Vent pipes for integral fuel tanks. Each integral fuel tank
must meet the following:
    (1) Each tank must have a vent that connects to the highest point
of the tank, discharges on a weather deck through a bend of 180 degrees
(3.14 radians), and is fitted with a 30-by-30-mesh corrosion-resistant
flame screen. Vents from two or more fuel tanks may combine in a system
that discharges on a weather deck. The net cross-sectional area of the
vent pipe for the tank must be not less than 312.3 square millimeters
(0.484 square inches), for any tank filled by gravity, but not less
than that of the fill pipe for any tank filled under pressure.
    (d) Fuel piping. Except as permitted in paragraphs (e)(1), (2), and
(3) of this section, each fuel line must be seamless and made of steel,
annealed copper, nickel-copper, or copper-nickel. Each fuel line must
have a wall thickness of not less than 0.9 millimeters (0.035 inch)
except that--
    (1) Aluminum piping is acceptable on an aluminum-hull vessel if it
is installed outside the engine room and is at least Schedule 80 in
thickness; and
    (2) Nonmetallic flexible hose is acceptable if it--
    (i) Is used in lengths of not more than 0.76 meters (30 inches);
    (ii) Is visible and easily accessible;
    (iii) Does not penetrate a watertight bulkhead;
    (iv) Is fabricated with an inner tube and a cover of synthetic
rubber or other suitable material reinforced with wire braid; and

    (v) Either,--
    (A) If it is designed for use with compression fittings, is fitted
with suitable, corrosion-resistant, compression fittings, or fittings
compliant with Society of Automotive Engineers (SAE) J1475
(incorporated by reference in Sec.  143.120 of this subchapter); or
    (B) If it is designed for use with clamps, is installed with two
clamps at each end of the hose. Clamps must not rely on spring tension
and must be installed beyond the bead or flare or over the serrations
of the mating spud, pipe, or hose fitting. Hose complying with SAE
J1475 (incorporated by reference in Sec.  143.120 of this subchapter),
is also acceptable.
    (3) Nonmetallic flexible hose complying with SAE J1942
(incorporated by reference in Sec.  143.120 of this subchapter), is
also acceptable.
    (e) A towing vessel of less than 79 feet in length may comply with
any of the following standards for fuel systems instead of those of
paragraph (d) in this section:
    (1) American Boat and Yacht Council (ABYC) H-33 (incorporated by
reference in Sec.  143.120 of this part);
    (2) Chapter 5 of National Fire Protection Association (NFPA) 302
(incorporated by reference in Sec.  143.120 of this part); or
    (3) 33 CFR chapter I, subchapter S (Boating Safety).

Sec.  143.290  Piping systems and tanks.

    Vessel piping and tanks that are exposed to the outside of the hull
must be made of metal and maintained in a leak free condition.

Sec.  143.295  Bilge pumps or other dewatering capability.

    Each towing vessel must have an installed bilge pump or another
method for emergency dewatering, such as a portable pump with
sufficient hose length. All bilge piping, whether installed or
portable, must have a check/foot valve in each bilge suction that
prevents unintended backflooding through bilge piping.

Sec.  143.300  Pressure vessels.

    (a) Pressure vessels over 5 cubic feet in volume and over 15 PSI
maximum allowable working pressure must be equipped with an indicating
pressure gage (in a readily visible location) and with one or more
spring-loaded relief valves. The total relieving capacity of such
relief valves must be such as to prevent pressure in the receiver from
exceeding the maximum allowable working pressure of the receiver, as
established by the manufacturer, by more than 10 percent.
    (b) Compressed air receivers must be examined and relief valves
must be tested at least annually.
    (c) Pressure vessels installed after [EFFECTIVE DATE OF FINAL RULE]
must meet the requirements of Sec.  143.540 of this part.

Sec.  143.305  Electrical systems, general.

    (a) Electrical systems and equipment on board towing vessels must
function properly and minimize system failures, fire hazards, and shock
hazards to personnel.
    (b) Installed electrical power source(s) must be capable of
carrying the electrical load of the towing vessel under normal
operating conditions.
    (c) Electrical equipment must be marked with its respective current
and voltage ratings.
    (d) All panels, motors, and major electrical equipment must be
marked with the location(s) of the designated isolating switch or
circuit breaker. Individual circuit breakers on switchboards and
distribution panels must be labeled with a description of the loads
they serve.
    (e) Electrical connections must be suitably installed to prevent
them from coming loose through vibration or accidental contact.
    (f) Electrical equipment and electrical cables must be suitably
protected from wet and corrosive environments.
    (g) Electrical components that pose an electrical hazard must be in
an enclosure.
    (h) Electrical conductors passing though watertight bulkheads must
be installed so that the bulkhead remains watertight.
    (i) When flexible cable is used to transmit power between the
vessel and tow:
    (1) The receptacles must be male and the flexible cable leads must
be female; and
    (2) The connection must be designed to prevent unintended
separation.

Sec.  143.310  Shipboard lighting.

    (a) Sufficient lighting suitable for the marine environment must be
provided on towing vessels within crew working and living areas.
    (b) Emergency lighting must be provided for all crew working and
living areas internal to the towing vessel. Emergency lighting sources
must provide for sufficient illumination under emergency conditions to
facilitate egress from each space and must be either:
    (1) Powered as described in Sec.  143.340(b)(9) of this part;
    (2) Automatic, battery-operated with a duration of no less than 3
hours; or
    (3) Non-electric, phosphorescent adhesive lighting strips that are
installed along escape routes and sufficiently visible to enable egress
with no power.
    (c) Each towing vessel must be equipped with at least two operable,
portable, and battery-powered lights. One must be located in the
pilothouse and the other at the access to the engine room.

Sec.  143.315  Navigation lights.

    (a) Towing vessels more than 65 feet in length must use navigation
lights that meet Underwriters Laboratories (UL) 1104 (incorporated by
reference in Sec.  143.120 of this part) or other standards specified
by the Coast Guard.
    (b) Towing vessels 65 feet or less in length may meet the
requirements listed in 33 CFR 183.810 or paragraph (a) of this section.

Subpart C--Deferred Requirements for Existing Towing Vessels

Sec.  143.320  Applicability.

    (a) This section applies to existing towing vessels, as defined in
Sec.  136.110 of this subchapter, that are not excepted towing vessels.
    (b) A towing vessel to which this section applies need not comply
with the requirements of this subpart until 5 years after the issuance
of its first Certificate of Inspection (COI).
    (c) Repairs and minor alterations to existing towing vessels must
be made in accordance with Subpart B of this part. New installations on
or after the date of issuance of the existing towing vessel's first
(COI) that are not ``replacements in kind'' on that vessel must comply
with subparts C and (if applicable) D of this part.

Sec.  143.325  Pilothouse alerter system.

    (a) A towing vessel with overnight accommodations and alternating
watches (shift work), when pulling, pushing or hauling along side one
or more barges, must have an alarm to detect when its master or mate
(pilot) becomes incapacitated. The alarm must:
    (1) Have a method to detect possible incapacitation of the master
and actuate in the pilothouse when this condition exists;
    (2) Require acknowledgement in the pilothouse within 10 minutes;
    (3) If not acknowledged within 10 minutes, promptly notify another
crewmember; and
    (4) Be distinct from any other alarm.
    (b) A towing vessel need not comply with this section if a second
person is provided in the pilothouse.

Sec.  143.330  Towing machinery.

    (a) Towing machinery such as capstans, winches, and other
mechanical devices used to connect the towing vessel to the tow must be
designed and installed to maximize control of the tow.
    (b) Towing machinery for towing astern must have sufficient
safeguards to prevent the machinery from becoming disabled in the event
the tow becomes out of line.
    (c) Towing machinery used to connect the towing vessel to the tow
must be suitable for its intended service. It must be capable of
withstanding exposure to the marine environment, likely mechanical
damage, static and dynamic loads expected during intended service, the
towing vessel's horsepower, and arrangement of the tow.
    (d) When a winch is used that has the potential for uncontrolled
release under tension, a warning must be in place at the winch controls
that indicates this. When safeguards designed to prevent uncontrolled
release are utilized, they must not be disabled.
    (e) Each owner or managing operator must develop procedures to
routinely examine, maintain, and replace capstans, winches, and other
machinery used to connect the towing vessel to the tow.

Sec.  143.335  Remote shutdowns.

    (a) Each towing vessel must have a remote manual shutdown for each
main propulsion engine and auxiliary generator engine, which can be
operated from a location outside the machinery space where the engines
are located.
    (b) The fuel shutoff required by Sec.  143.280(b) of this part may
serve as the remote manual shutdown, provided each engine can be
independently shutdown.

Sec.  143.340  Electrical power sources, generators, and motors.

    (a) Functional Requirements. (1) Each towing vessel must have
sufficient electrical power to provide for the applicable power needs
for:
    (i) Propulsion, steering and control systems;
    (ii) Safety systems;
    (iii) Navigation systems;
    (iv) Control of the tow;
    (v) Minimum conditions of habitability; and
    (vi) Other installed or portable systems and equipment.
    (2) Generators and motors must be suitably rated for the
environment where they operate, marked with their respective ratings,
and suitably protected against overcurrent.
    (3) In the event of a main power source failure, a towing vessel,
other than an excepted towing vessel, must have a means to power
essential alarms, lighting, radios, navigation equipment, and any other
essential system identified by an approved third party or the cognizant
Officer in Charge, Marine Inspection (OCMI).
    (b) Prescriptive option to meet functional requirements. (1) The
owner or managing operator of each towing vessel must complete a load
analysis that shows that the electrical power source is sufficient to
power the sum of connected loads described in paragraph (a)(1) of this
section utilizing an appropriate load factor for each load.
    (2) Prior to implementation of this section, the owner or managing
operator must complete the load analysis of paragraph (b)(1) of this
section. A record of the analysis must be retained by the owner or
managing operator and be available upon request of the approved third
party or cognizant OCMI.
    (3) The owner or managing operator must have procedures for the
evaluation of additional electrical loads added to the towing vessel to
ensure compliance with paragraph (a)(1) of this section.
    (4) Installed generators or motors must have a data plate listing
rated kilowatts and power factor (or current), voltage, and ambient
temperature.
    (5) Generators must be provided with overcurrent protection no
greater than 115 percent of their rated current and utilize a
distribution panel.
    (6) Motors must be provided with overcurrent protection that meets
article 430 of the National Electric Code (NEC) (incorporated by
reference in Sec.  143.120 of this subchapter). Steering motor circuits
must be protected as per Part 4 Chapter 6 Section 2, Regulation 11
(except 11.7) of American Bureau of Shipping (ABS) Rules for Building
and Classing Steel Vessels Under 90 Meters (295 feet) in Length,
(incorporated by reference in Sec.  143.120 of this part).
    (7) Generators and motors installed in machinery spaces must be
certified to operate in an ambient temperature of 50[deg]C unless they
are derated. When derating, divide the rated ambient temperature of the
generator (in degrees Celsius) by 50[deg]C and multiply the resulting
factor by the maximum rated current of the generator. Each generator
and motor, except a submersible-pump motor, must be in an accessible
space which is adequately ventilated and as dry as practicable. It must
be mounted above the bilges to avoid damage by splash and to avoid
contact with low-lying vapors.
    (8) A generator driven by a main propulsion unit (such as a shaft
generator) which is capable of providing electrical power continuously,
regardless of the speed and direction of the propulsion shaft, may be
considered one of the power sources required by paragraph (a) of this
section. Any vessel speed change or throttle movement must not cause
electrical power interruption.
    (9) Other than excepted towing vessels, each towing vessel that
relies on electricity for power must be arranged so that the following
loads can be energized from two independent sources of electricity:
    (i) Alarms required by Sec.  143.245 of this part;
    (ii) Emergency egress lighting, unless the requirements of Sec.
143.310(b)(2) or (3) of this part are met;
    (iii) Navigation lights;
    (iv) Pilothouse lighting;
    (v) Any installed radios and navigation equipment; and
    (vi) Any essential system identified by an approved third party or
the cognizant Officer in Charge, Marine Inspection.
    (vii) If a battery is used as the second source of electricity
required of this subsection, it must be capable of supplying the loads
for at least three hours.

Sec.  143.345   Electrical distribution panels and switchboards.

    (a) Each distribution panel or switchboard on a towing vessel must
be:
    (1) In a location that is accessible, as dry as practicable,
adequately ventilated, and protected from falling debris and dripping
or splashing water;
    (2) Totally enclosed and of the dead-front type; and
    (3) Fitted with a drip shield, unless the switchboard or
distribution panel is of a type mounted deck-to-overhead and is not
subject to falling objects or liquids from above.
    (b) Each switchboard accessible from the rear must be constructed
to prevent a person's accidental contact with energized parts.
    (c) Nonconductive mats or grating must be provided on the deck in
front of each switchboard and, if it is accessible from the rear, on
the deck behind the switchboard.
    (d) Each un-insulated current-carrying part must be mounted on
noncombustible, nonabsorbent, and high-dielectric insulating material.
    (e) Equipment mounted on a hinged door of an enclosure must be
constructed or shielded so that a person will not come into accidental
contact with energized parts of the door-mounted equipment when the
door is open and the circuit energized.

Sec.  143.350   Electrical overcurrent protection other than generators
and motors.

    (a) Functional requirement. Power and lighting circuits on towing
vessels must be protected by suitable overcurrent protection. On a
towing vessel, other than an excepted towing vessel as defined in Sec.
136.110 of this subchapter, an overcurrent protection device must not
be used for both essential and non-essential systems.
    (b) Prescriptive option to meet functional requirements. (1) Cable
and wiring used in power and lighting circuits must be protected by
overcurrent protection that opens the circuit at the standard setting
closest to 80 percent of the manufacturer's listed ampacity.
Overcurrent protection setting exceptions allowed by the National
Electric Code (NEC), Article 240 (incorporated by reference in Sec.
143.120 of this subchapter) may be employed.
    (2) If the manufacturer's listed ampacity is not known, table
310.16 of the NEC (incorporated by reference in Sec.  143.120 of this
part) must be used, assuming a temperature rating of 75 degrees and an
assumed temperature of 50 degrees Celsius for machinery spaces and 40
degrees for other spaces.
    (3) Overcurrent protection devices must be installed in a manner
that will not open the path to ground in a circuit; only ungrounded
conductors must be protected. Overcurrent protection must be
coordinated such that an overcurrent situation is cleared by the
nearest circuit breaker or fuse.
    (4) Each transformer must have protection against overcurrent that
meets article 450 of the NEC (incorporated by reference in Sec.
143.120 of this part).
    (5) On a towing vessel, other than an excepted vessel as defined in
Sec.  136.110 of this subchapter, essential systems and non-essential
systems must not be on the same circuit or share the same overcurrent
protective device.

Sec.  143.355   Electrical grounding and ground detection.

    (a) Dual voltage electrical distribution systems on towing vessels
must have the neutral suitably grounded. There must be only one
connection to ground, regardless of the number of power sources. This
connection must be at the main switchboard or distribution panel.
    (b) On a metallic towing vessel, a grounded distribution system
must be grounded to the hull. This grounded system must be connected to
a common, non-aluminum ground plate. The ground plate must have only
one connection to the main switchboard or distribution panel, and the
connection must be readily accessible for examination.
    (c) On a nonmetallic towing vessel, all electrical equipment must
be grounded to a common ground. Multiple ground plates bonded together
are acceptable.
    (d) Each insulated grounding-conductor of a cable must be
identified by one of the following means:
    (1) Wrapping the cable with green braid or green insulation;
    (2) Stripping the insulation from the entire exposed length of the
grounding-conductor; or
    (3) Marking the exposed insulation of the grounding-conductor with
green tape or green adhesive labels.
    (e) A towing vessel's hull may not carry current as a conductor,
except for an impressed-current cathodic-protection system or a battery
system to start an engine.
    (f) Cable armor may not be used to ground electrical equipment or
systems.
    (g) Each receptacle outlet and attachment plug for a portable lamp,
tool, or similar apparatus operating at 100 or more volts must have a
grounding-pole and a grounding-conductor in the portable cord.
    (h) In a grounded distribution system, only grounded, three-prong
appliances may be used. Adaptors that allow an ungrounded, two-prong
appliance to fit into a grounded, three-prong, receptacle must not be
used.
    (i) A suitable method must be in place to detect unintentional
grounds.

Sec.  143.360   Electrical conductors, connections, and equipment.

    (a) Each cable and wire on a towing vessel must:
    (1) Have conductors with sufficient current-carrying capacity for
the circuit in which it is used;
    (2) Be suitably supported every 24 inches with metal supports and
not installed with sharp bends;
    (3) Be installed in a manner to prevent contact with personnel,
mechanical hazards, and hazards from leaking fluids and must not be
installed in bilges, locations where a piping leak would drip on them,
across a normal walking path, or less than 24 inches from moving
machinery;
    (4) Have connections and terminations suitable for copper stranded
conductors that retain the original electrical, mechanical, flame-
retarding, and where necessary, fire-resisting properties of the
conductor. If twist-on types of connectors are used, the connections
must be made within an enclosure and the insulated cap of the connector
must be secured to prevent loosening due to vibration. Twist-on type of
connectors may not be used for making joints in cables, facilitating a
conductor splice, or extending the length of a circuit;
    (5) Be installed so as to avoid or reduce interference with radio
reception and compass indication;
    (6) Be protected from the weather;
    (7) Be supported in order to avoid chafing or other damage;
    (8) Be protected by metal coverings or other suitable means, if in
areas subject to mechanical abuse;
    (9) Be suitable for low temperature and high humidity, if installed
in refrigerated compartments;
    (10) Be located outside a tank, unless it supplies power to
equipment in the tank; and
    (11) If wire is installed in a tank, it must have sheathing or wire
insulation compatible with the fluid in a tank.
    (b) Extension cords may not be used as a permanent source of
electrical power.
    (c) Multi-outlet adapters may not be used to expand the capacity of
a receptacle.

Subpart D--Requirements for Towing Vessels That Tow Oil or
Hazardous Materials in Bulk

Sec.  143.400   General applicability.

    This subpart applies to a towing vessel subject to this subchapter
that moves barges carrying oil or hazardous materials in bulk.
    (a) An existing towing vessel need not comply with the requirements
of this subpart until 5 years after the issuance of its first
Certificate of Inspection (COI).
    (b) An excepted towing vessel, as defined in Sec.  136.110 of this
subchapter, is not required to comply with the requirements of this
subpart.

Sec.  143.405   General requirements for propulsion, steering, and
related controls.

    (a) A towing vessel to which this subpart applies must have an
alternate means to control the propulsion and steering system which
shall:
    (1) Be independent of the primary control required by Sec.  143.240
of this part;
    (2) Be located at or near the propulsion and steering equipment;
and
    (3) Be readily accessible and suitable for prolonged operation.
    (b) A towing vessel to which this subpart applies must have a means
to communicate between the operating station and the alternate
propulsion and steering controls.
    (c) A towing vessel to which this subpart applies must have a means
to stop each propulsion engine and steering motor from the operating
station.

    (d) The means to monitor the amount of thrust, rudder angle, and
(if applicable) direction of thrust must be independent of the controls
required by Sec.  143.240 of this part.
    (e) The propulsion control system required by Sec.  143.240 of this
part must be designed so that, in the event of a single failure of any
component of the system, propeller speed and direction of thrust are
maintained or reduced to zero.
    (f) On a towing vessel with an integrated steering and propulsion
system, such as a Z-drive, the control system required by Sec.  143.240
of this part must be designed so that, in the event of a single failure
of any component of the system, propeller speed and direction of thrust
are maintained or the propeller speed is reduced to zero.
    (g) An audible and visual alarm must actuate at the operating
station when:
    (1) The propulsion control system fails;
    (2) A non-follow up steering control system fails, if installed;
and
    (3) The ordered rudder angle does not match the actual rudder
position on a follow-up steering control system, if installed. This
alarm must have an appropriate delay and error tolerance to eliminate
nuisance alarms.
    (h) Alarms must be separate and independent of the control system
required by Sec.  143.240 of this part and function when primary
electrical power is lost.
    (i) A means of communication must be provided between the operating
station and any crewmember(s) required to respond to alarms.
    (j) The two sources of electricity required by Sec.  143.340(a)(3)
and (b)(9) of this part must be capable of powering electrical loads
needed to maintain propulsion, steering, and related controls for not
less than 3 hours.
    (k) A towing vessel to which this subpart applies that uses
propulsion, steering, or related controls that are directly reliant on
electrical power, must have a means to automatically restore power to
propulsion, steering, and related controls when the main power source
fails.
    (l) A towing vessel to which this subpart applies that uses
propulsion, steering, or related controls that are directly reliant on
stored energy, such as air or hydraulics, must:
    (1) Have two independent, stored energy systems capable of
maintaining propulsion, steering, and related controls; and
    (2) If the stored energy system is recharged by electrical power,
have sufficient stored energy available to provide time to switch
electrical power sources without a loss of propulsion, steering, or
related controls.
    (m) After a power failure, electrical motors used to maintain
propulsion and steering must automatically restart when power is
restored, unless remote control starting is provided at the operating
station.

Sec.  143.410   Propulsor redundancy.

    (a) A towing vessel must be provided with at least two independent
propulsors unless the requirements of Sec.  143.420 are met.
    (b) There must be independent controls for each propulsor at the
operating station.
    (c) In the event of a failure of a single propulsor, the remaining
propulsor(s) must have sufficient power to maneuver the vessel to a
safe location.

Sec.  143.420   Vessels with one propulsor.

    (a) A towing vessel must have independent, duplicate vital
auxiliaries. For the purpose of this section, vital auxiliaries are the
equipment necessary to maintain the propulsion engine (e.g., fuel,
lubricating oil, and cooling pumps). In the event of a failure or
malfunction of any single vital auxiliary, the propulsion engine must
continue to provide propulsion adequate to maintain control of the tow.
    (b) In the event of a failure, the corresponding independent
duplicate vital auxiliary, described in paragraph (a) of this section,
must automatically assume the operation of the failed unit.
    (c) Propulsion engine fuel line(s) must meet the requirements of
Sec.  143.285, regardless of build date.
    (d) A towing vessel must be provided with an independent, auxiliary
steering system that:
    (1) Has independent controls available at the operating station;
    (2) Is immediately available upon the loss of main steering system;
    (3) Is appropriate to maneuver the tow; and
    (4) Remains operable in the event of any single failure that
affects the main steering system. This does not apply to failures of
the tiller, quadrant, or other equipment that serve the same purpose.
    (e) For the purpose of this section, the place where isolation
valves join the piping system, as by a flange, constitutes a single-
failure point. The valve itself need not constitute a single-failure
point if it has a double seal to prevent substantial loss of fluid
under pressure.

Sec.  143.430   Alternative standards.

    (a) In lieu of meeting this subpart, a towing vessel may comply
with the American Bureau of Shipping (ABS) Steel rules for vessels
under 90 meters (incorporated by reference in Sec.  143.120 of this
part) as follows:
    (1) Sections 4-7-5 (class ACBU) and 4-3-5 (class R2); and
    (2) A vessel that operates exclusively on rivers or intracoastal
waterways need not meet 4-7-4/3.9 and the automatic day tank fill pump
requirement of 4-7-4/25.3.
    (b) A vessel meeting the alternative standards of this section must
comply with Sec.  143.435 of this subpart.

Sec.  143.435   Demonstration of compliance.

    (a) The owner or managing operator of each towing vessel must
devise test procedures that demonstrate compliance with the design and
engineering requirements prescribed in this subpart.
    (b) The tests required in paragraph (a) of this section must be
satisfactorily conducted and witnessed by an approved third party or
cognizant Officer in Charge, Marine Inspection (OCMI) prior to
implementation date of this section. A record of the test must be
retained by the owner or managing operator and be available upon
request of the approved third party or cognizant OCMI.

Subpart E--New Towing Vessels

Sec.  143.500   Applicability.

    This subpart applies to a new towing vessel, as defined in Sec.
136.110 of this subchapter, unless it is an excepted vessel.

Sec.  143.505   Standards to be used.

    (a) Except as noted in paragraph (b) of this section, a new towing
vessel must be constructed using the standards specified in this part.
The standard selected must be used in its entirety.
    (b) An alternate standard may be considered by the Commanding
Officer, Marine Safety Center where it can be shown that it provides an
equivalent level of safety and performance.

Sec.  143.510   Plan approval.

    Procedures for plan approval are contained in part 144 of this
subchapter.

Sec.  143.515  Towing vessels built to American Bureau of Shipping
rules.

    (a) Except as noted in paragraph (b) of this section:
    (1) A towing vessel classed by the American Bureau of Shipping
(ABS) (incorporated by reference in Sec.  143.120 of this part) in
accordance with their rules as appropriate for the intended service and
routes is considered in compliance with this subpart.
    (2) A towing vessel built and equipped to conform to ABS

(incorporated by reference in Sec.  143.120 of this subchapter) rules
appropriate for the intended service and routes, but not currently
classed, may be deemed to be in compliance with this subpart providing
it can be shown that the vessel continues to conform to ABS rules.
    (b) In addition to the requirements in paragraph (a) of this
section, a new towing vessel:
    (1) That moves barges carrying oil or hazardous materials in bulk
must meet the class requirements described in Sec.  143.430 of this
part.
    (2) Must meet the potable water requirements in Sec.  143.530 of
this part.
    (3) Must meet the pilothouse alerter requirements in Sec.  143.325
of this part.
    (4) Must meet the towing machinery requirements of Sec.  143.330 of
this part.

Sec.  143.520  Towing vessels built to American Boat and Yacht Council
(ABYC) standards.

    (a) Except as noted in paragraph (b) of this section, a new towing
vessel 65 feet (19.8 meters) or less in length built to conform with
the American Boat and Yacht Council (ABYC) standards listed in this
paragraph (Incorporated by reference in Sec.  143.120 of this
subchapter) is considered in compliance with this subpart.
    (1) H-2-Ventilation of Boats Using Gasoline;
    (2) H-22--Electric Bilge Pump Systems;
    (3) H-24--Gasoline Fuel Systems;
    (4) H-25--Portable Gasoline Fuel Systems for Flammable Liquids;
    (5) H-32--Ventilation of Boats Using Diesel Fuel;
    (6) H-33--Diesel Fuel Systems;
    (7) P-1--Installation of Exhaust Systems for Propulsion and
Auxiliary Engines; and
    (8) P-4--Marine Inboard Engines and Transmissions
    (9) ABYC E-11--AC & DC Electrical Systems on Boats.
    (b) In addition to the requirements in paragraph (a) of this
section, a new towing vessel 65 feet (19.8 meters) or less in length
must meet the:
    (1) Requirements of subpart B of this part;
    (2) Requirements described in subpart D of this part if it moves
oil or hazardous materials in bulk;
    (3) Potable water requirements in Sec.  143.530 of this part;
    (4) Pilothouse alerter requirements in Sec.  143.325 of this part;
and
    (5) Towing machinery requirements of Sec.  143.330 of this part.

Sec.  143.525  Towing vessels not built to American Bureau of Shipping
(ABS) rules or American Boat and Yacht Council (ABYC) standards.

    A new towing vessel not built to American Bureau of Shipping rules
or American Boat and Yacht Council standards must meet subparts B and C
of this part and Sec. Sec.  143.530 through 143.555 of this subpart.

Sec.  143.530  [Reserved]

Sec.  143.532  New towing vessels that move barges carrying oil or
hazardous materials in bulk.

    A new towing vessel that moves barges carrying oil or hazardous
materials in bulk must meet the requirements in subpart D of this part.

Sec.  143.535  Pumps, pipes, valves, and fittings for essential
systems.

    (a) In lieu of meeting the requirements of Sec.  143.285 of this
part, a new towing vessel must meet the requirements of this section.
    (b) Except as noted in paragraph (c) of this section pumps, pipes,
valves, and fittings in essential systems on vessels must meet American
Bureau of Shipping (ABS) rules for Steel Vessels under 90 Meters
(incorporated by reference in Sec.  143.120 of this part), Part 4,
Chapter 4 as applicable.
    (c) Pumps, pipes, valves, and fittings in essential systems on
towing vessels operating exclusively on rivers or intracoastal
waterways may meet ABS Rules for Steel Vessel on Rivers and
Intracoastal Waterways (incorporated by reference in Sec.  143.120 of
this subchapter), Part 4, Chapter 3 as applicable in lieu of paragraph
(b) of this section.

Sec.  143.540  Pressure vessels.

    (a) In lieu of meeting the requirements of Sec.  143.300 of this
part, a new towing vessel must meet the requirements of this section.
    (b) Pressure vessels over 5 cubic feet in volume and over 15 pounds
per square inch maximum allowable working pressure on new towing
vessels must meet American Bureau of Shipping Rules for Steel Vessels
under 90 Meters (incorporated by reference in Sec.  143.120 of this
part), Part 4, Chapter 1, Section 1, Regulation 7.5.

Sec.  143.545  Steering systems.

    (a) Except as noted in paragraph (b) of this section, steering
systems on new towing vessels must meet American Bureau of Shipping
(ABS) rules for Steel Vessels under 90 Meters (incorporated by
reference in Sec.  143.120 of this part), section 4-3-3, as applicable.
    (b) Steering systems on new towing vessels operating exclusively on
rivers or intracoastal waterways may meet ABS Rules for Steel Vessels
on Rivers and Intracoastal Waterways (incorporated by reference in
Sec.  143.120 of this part), section 4-2-3 as applicable, in lieu of
paragraph (a) of this section.

Sec.  143.550  Electrical installations.

    (a) In lieu of meeting the requirements of Sec. Sec.  143.340-360
of this part, a new towing vessel must meet the requirements of this
section.
    (b) Except as noted in paragraph (c) of this section, electrical
installations on vessels must meet American Bureau of Shipping (ABS)
Rules for Steel Vessels Under 90 Meters (incorporated by reference in
Sec.  143.120 of this part), chapter 4-6.
    (c) Electrical installations on vessels operating exclusively on
rivers or intracoastal waterways may meet ABS Rules for Steel Vessels
on Rivers and Intracoastal Waterways (incorporated by reference in
Sec.  143.120 of this part), Part 4, Chapter 5 in lieu of paragraph (a)
of this section.

PART 144--CONSTRUCTION AND ARRANGEMENT

Subpart A-General
Sec.
144.100 Purpose.
144.105 Definitions.
144.110 Incorporation by reference.
Subpart B--All Towing Vessels
144.200 Applicability.
144.205 Towing Safety Management System (TSMS).
144.210 General.
144.215 Special consideration.
144.220 Verification of compliance.
144.225 Qualifications.
144.230 Procedures for verification of compliance with construction
and arrangement standards.
144.235 Verification for sister vessels.
144.240 Marking of towing vessels.
Subpart C--Existing Towing Vessels
144.300 Applicability.
144.305 General.
144.310 Structural standards.
144.315 Stability.
144.320 Watertight integrity.
144.325 Visibility from pilothouse.
144.330 Emergency escape.
144.335 Handrails and bulwarks.
144.340 Storm rails.
144.345 Guards in dangerous places.
144.350 Exhausts.
144.355 Crew Spaces.
144.360 Ventilation for accommodations.
Subpart D--New Towing vessels
144.400 Applicability.
144.405 Vessels built to class.
144.410 Structural standards.
144.415 Stability.
144.420 Minimum standards.

144.425 Visibility.
144.430 Windows and portholes.
144.435 General fire protection.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904;
33 CFR 1.05; DHS Delegation 0170.1.

Subpart A--General

Sec.  144.100  Purpose.

    This part details the requirements for design, construction and
arrangement, and plan review and approval for towing vessels.

Sec.  144.105  Definitions.

    The definitions provided in Sec.  136.110 of this subchapter apply
to this part.

Sec.  144.110  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part
with the approval of the Director of the Federal Register under 5 U.S.C
552(a) and 1 CFR part 51. To enforce any edition other than that
specified in this section, the Coast Guard must publish notice of
change in the Federal Register and the material must be available to
the public. All approved material is available for inspection at the
National Archives and Records Administration (NARA). For information on
the availability of this material at NARA, call<PHONE_NUMBER>, or go to:
http://www.archives.gov/federal_register/code_of_federal
regulations/ibr_locations.html. Also, it is available for inspection
at U.S. Coast Guard, Office of Design and Engineering Standards (CG-
521), 2100 Second Street SW., Washington, DC 20593-0001, and is
available from the sources listed in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this
part and the sections affected are:

------------------------------------------------------------------------

------------------------------------------------------------------------
  American Bureau of Shipping (ABS), ABS Plaza, 16855 Northchase Drive,
                            Houston, TX 77060
------------------------------------------------------------------------
Rules for Building and Classing Steel Vessels for                144.410
 Service on Rivers and Intracoastal Waterways, 2007.....
Rules for Building and Classing Steel Vessels Under 90           144.410
 Meters (295 Feet) in Length, 2006......................
------------------------------------------------------------------------
 International Maritime Organization, (IMO). 4 Albert Embankment, London
                                 SE1 7SR
------------------------------------------------------------------------
Resolution A.688(17) Fire Test Procedures For                    144.435
 Ignitability of Bedding Components, 1991...............
------------------------------------------------------------------------

Subpart B--All Towing Vessels

Sec.  144.200  Applicability.

    This subpart applies to all towing vessels subject to this
subchapter.

Sec.  144.205  Towing Safety Management System (TSMS).

    If a Towing Safety Management System (TSMS) is applicable to the
vessel, the TSMS must:
    (a) Include policies and procedures to ensure compliance with this
part; and
    (b) Provide objective evidence that documents compliance with the
TSMS.

Sec.  144.210  General.

    The construction and arrangement of the towing vessel must be
suitable for the service and route of the vessel, including the welfare
of the crew and control of the tow.

Sec.  144.215  Special consideration.

    The cognizant Officer in Charge, Marine Inspection may give special
consideration to the structural requirements for small vessels or
vessels of an unusual design not contemplated by the rules of the
American Bureau of Shipping or other recognized classification society.

Sec.  144.220  Verification of compliance.

    A verification of compliance with established standards must be
performed as follows:
    (a) Prior to conducting a major conversion or alternation to the
hull, machinery, or equipment that affect the safety of a new or
existing towing vessel;
    (b) For new installations, after [date final rule takes effect],
that are not ``replacements in kind'' on an existing towing vessel; and
    (c) Upon request of the Coast Guard.

Sec.  144.225  Qualifications.

    (a) Verification of compliance with this part must be performed by
a registered Professional Engineer (P.E.) licensed by one of the 50
states of the United States or the District of Columbia, or by a
current, full time employee of the American Bureau of Shipping (ABS).
    (b) The P.E. must ensure that he or she does not exceed the scope
of his or her P.E. license.
    (c) In the case of certifications by ABS employees, ABS must ensure
the reviewer holds proper ABS qualifications for the particular type of
review being conducted.

Sec.  144.230  Procedures for verification of compliance with
construction and arrangement standards.

    (a) Verification of compliance with construction and arrangement
standards for towing vessels, when required, must be performed by an
individual meeting the requirements of Sec.  144.225 of this part.
    (b) Objective evidence of compliance must be provided to the Coast
Guard and include:
    (1) A description of the towing vessel's intended service and
route;
    (2) The standards applied;
    (3) Deviations from the standards used;
    (4) A statement that the towing vessel is suitable for the intended
service and route;
    (5) The name, address, employer affiliation, license number, and
state of licensure of the professional engineer making the
verification; and
    (6) Attestation by the builder that the vessel was built to plans.
    (c) The verification must include a review and analyses of
sufficient plans, drawings, schematics, and calculations to ensure the
vessel complies with the standards used. The plans must be stamped or
otherwise indicate that they have been reviewed by an individual
meeting the requirements of Sec.  144.225.
    (d) A copy of the verified plans must be forwarded to the cognizant
Officer in Charge, Marine Inspection in whose zone the work will be
performed.
    (e) A copy of the verified plans must be available at the
construction site.
    (f) Plans reviewed and approved by the American Bureau of Shipping
need not be forwarded to the Coast Guard unless requested.

Sec.  144.235  Verification for sister vessels.

    (a) A full verification of compliance is not required for sister
towing vessels, provided that:
    (1) The plans for the original vessels have already been verified
as complying with this part;
    (2) The owner authorizes their use for the new construction;
    (3) The regulations or published standards have not changed since
the original verification;
    (4) The sister vessel is built to the same plans and equipped with
the same machinery as the first vessel of the class, and has not been
subsequently modified;

    (5) The sister vessel is built in the same shipyard facility as the
first vessel;
    (6) For stability purposes, the sister vessel is delivered within 2
years of the stability test date of an earlier vessel in the class. If
delivered later than 2 years, the sister vessel must undergo a
deadweight survey to determine its actual light ship displacement and
Longitudinal Center of Gravity (LCG). If the deadweight survey results
are within 3 percent of the earlier vessel's approved light ship
displacement and within 1 percent Length Between Perpendiculars (LBP)
of the earlier vessel's approved light ship LCG, it may be accepted as
a sister vessel and use the earlier vessel's approved light ship
Vertical Center of Gravity (VCG); and
    (7) If no vessel of the class previously underwent a stability
test, then one vessel of the class must undergo a stability test in
accordance with 46 CFR Part 170 Subpart F, and the sister vessel(s)
must undergo a deadweight survey in accordance with paragraph (a)(6) of
this section.
    (b) A statement verifying sister status from an individual meeting
the requirements of Sec.  144.225 of this section must be retained and
produced upon request.

Sec.  144.240  Marking of towing vessels.

    (a) The hull of each documented towing vessel must be marked as
required by part 67 of this chapter.
    (b) The hull of each undocumented towing vessel must be marked with
its name and hailing port.
    (c) A towing vessel required to comply with Sec. Sec.  144.315 and
144.415 must have the drafts of the vessel plainly and legibly marked
up the stem and upon the sternpost or rudderpost or at any place at the
stern of the vessel that is easily observed. The bottom of each mark
must indicate the draft.
    (d) Each towing vessel assigned a load line must have load line
markings and deck line markings permanently scribed or embossed as
required by subchapter E of this chapter.
    (e) Watertight doors and watertight hatches must be marked on both
sides in clearly legible letters at least 25 millimeters (1 inch) high:
``WATERTIGHT DOOR--KEEP CLOSED'' or ``WATERTIGHT HATCH--KEEP CLOSED''.
    (f) All escape hatches and other emergency exits used as means of
escape must be marked on both sides in clearly legible letters at least
50 millimeters (2 inches) high: ``EMERGENCY EXIT, KEEP CLEAR''.

Subpart C--Existing Towing Vessels

Sec.  144.300  Applicability.

    This subpart applies to all existing towing vessels as defined in
Sec.  136.110 of this subchapter.

Sec.  144.305  General.

    (a) Except as otherwise required in this part, an existing towing
vessel must comply with the construction and arrangement standards that
were applicable to the vessel prior to the implementation date of these
regulations.
    (b) Alterations or modifications made to the structure or
arrangements of an existing towing vessel that are a major conversion,
on or after the [effective date of regulations], must comply with the
regulations of this part.
    (c) Repairs conducted on an existing towing vessel, resulting in no
significant changes to the original structure or arrangement of the
vessel, must comply with the standards applicable to the vessel at the
time of construction or as an alternative, with the regulations in this
part.

Sec.  144.310  Structural standards.

    (a) A existing towing vessel classed by the American Bureau of
Shipping (ABS) in accordance with their rules as appropriate for the
intended service and routes of the vessel, meets the structural
standards of this subpart.
    (b) A existing towing vessel with a valid load line certificate
issued in accordance with Subchapter E of this chapter may be deemed in
compliance with the structural requirements of this subpart.
    (c) A existing towing vessel built to International Convention for
Safety of Life at Sea (SOLAS) 1974, as amended, is considered to be in
compliance with this part.
    (d) A existing towing vessel built and equipped to conform to ABS
rules appropriate for the intended service and routes, but not
currently classed, may be deemed to be in compliance with this subpart,
provided that the vessel continues to conform to ABS rules.
    (e) The current standards of other recognized classification
societies may be accepted upon approval by the Coast Guard.
    (f) Classification by a recognized classification society is not
required.

Sec.  144.315  Stability.

    (a) This section applies to an existing towing vessel with a
previously issued stability document.
    (b) Each existing towing vessel operating under a previously issued
stability document must continue to operate in accordance with the
conditions specified therein and the requirements of this section.
    (c)(1) A weight and moment history of changes to the vessel since
approval of its light ship characteristics (displacement, Longitudinal
Center of Gravity (LCG) and Vertical Center of Gravity (VCG)) shall be
maintained. All weight modifications to the vessel (additions,
removals, and relocations) shall be recorded in the history, along with
a description of the change(s), when and where accomplished, moment
arms, etc. After each modification, the light ship characteristics
shall be recalculated.
    (2) When the aggregate weight change (absolute total of all
additions, removals, and relocations) is more than 2 percent of the
vessel's approved light ship displacement, or the recalculated change
in the vessel's light ship LCG is more than 1 percent of its length
between perpendiculars (LBP), a deadweight survey shall be performed to
determine the vessel's current light ship displacement and LCG. If the
deadweight survey results are within 1 percent of the recalculated
light ship displacement and within 1 percent LBP of the recalculated
light ship LCG, then the recalculated light ship VCG can be accepted as
accurate. If, however, the deadweight survey results are outside these
tolerances, then the vessel must undergo a full stability test in
accordance with 46 CFR 170 subpart F.
    (3) When the aggregate weight change is more than 10 percent of the
vessel's approved light ship displacement, the vessel must undergo a
full stability test in accordance with 46 CFR Part 170 Subpart F.
    (d) The cognizant Officer in Charge, Marine Inspection may restrict
the route of an existing towing vessel based on concerns for the
vessel's stability.

Sec.  144.320  Watertight integrity.

    (a) An existing towing vessel must comply with the watertight
integrity regulations which were applicable to the vessel on [EFFECTIVE
DATE OF FINAL RULE], except that:
    (1) Hatches, doors, vent closures, and other fittings affecting the
watertight integrity of the vessel must be in place and operable;
    (2) Decks and bulkheads designed to be watertight or weathertight
must be maintained in that condition;