british submarine group class built launched november far boat royal_navy bear item clothing having launched war selected number boats class try new techniques based german type submarine involved collision february underwent exercises hours collision returned static training submarine shore establishment hms sold broken design description originally ordered orders switched ordered named official dress herald boat royal_navy bear laid september launched november completed june fourteen boats ordered programme completed unlike earlier boats class equipped inch gun shield standard open gun mounting aft cannon mounting modified boats having holes cut pedestal drainage group hull increased diving depth feet following post war tests submarines decided admiralty modify class submarines batteries increase power motors hulls pressure hull cut end engine room submarine lengthened feet gave room add additional battery compartment second pair electric motors propulsion system changed direct diesel electric transmission hms boats modified incorporating bridge streamlined fin adjustments hull external fittings removed including external torpedo tubes gun radar masts mast wireless mast incorporated new bridge fin service commissioned end second world war initially sent mediterranean duties march number ships operation step training exercise combined bulk home_fleet mediterranean_fleet biggest concentration british ships november january carrying duke edinburgh escorted hms surprise carrying admiral sir meet saudi_arabia talks refitted malta june damaged electrical cables installed reports british media arose little month later mistakenly damage december rescued later captain observer downed joined sydney australia underwent refit sydney january march submarine refitted operated units april collided wharf docking brisbane damaging equipment involved minor collision frigate following week anti submarine training exercises depth passed bending submarine fin frigate keel port propeller vessels able safely return sydney docked naval base repairs february participated anti submarine exercises aircraft carrier destroyer finishing hours day hours later voyager sailed melbourne bow cut sunk killing crew known voyager incident later year june participated news anti submarine exercise coast new_zealand underwent second refit island october december extensive repairs required fin salt water systems following establishment 1st australian submarine squadron returned remained loan returned united_kingdom march permanently moored static training submarine hms shore establishment replaced class boat service royal_navy albeit non operationally finally sold scrap january arriving breakers march service spent years mediterranean years australia covering miles
HMS Tabard (P342)