 "McArthur II" has a wet laboratory freezer, a dry laboratory freezer, and an oceanographic laboratory refrigerator.On deck, she has a 2.3-ton-capacity deck crane with a boom that extends to 46 feet (14 m), two oceanographic winches, a movable A-frame, and a movable J-frame.She carries one 24-foot (7.3 m) and one 21-foot (6.4 m) Zodiac rigid-hulled inflatable boats (RHIB).