Includes Aircraft Carriers; Battleships; Cruisers; Destroyers; Submarines; Frigates and Corvettes; Gunboats; Motor Torpedo Boats; Subchasers; Landing Barges; Minelaying and Mine Sweeping Craft.
Includes Tugs; Towboats; Fire Boats; Ice Breakers; Repair Ships; Tender Vessels (Buoy, Lighthouse, Destroyer); Lightships; Cable Ships; Salvage and Submarine Rescue Vessels.
Excludes Combat Vessels; Dredges.
Includes Aircraft Lighters, Car Floats, and other Transportation Barges, Depot Barges; Scows.
Includes Derrick, Piledriver, and Rock Cutter Barges; Barrage Balloon, Catapult Lighter, and Torpedo Testing Barges; Concrete Mixing Plant, Mechanical Bank Grader, and other Bank Revetment Barges; Fire, Smudge Removal, and other Pump Barges; Houseboats, except Yacht Type; Power Plant Barges; Refrigeration Barges; Barge Mounted Cranes, Flexible Towed Barges.
Excludes Combat Landing Barges.
Includes Powered and Unpowered Small Craft; Lifesaving Boats; Airplane Crash Boats; Reconnaissance Boats; Yachts; Pneumatic Boats.
Excludes Fishing Craft; Life Rafts, including Pneumatic; Bridge Floats and Pontoons.
Includes Camels; Pontoon Stanchions; Pontoon Ramps.
Excludes Floating Drydocks; Bridge Floats and Pontoons; Pontoon Hardware (Jewelry).
Includes Dredges, without Hull; Ocean-Going Dredges; Floating Dredges.
Includes Commercial Sailing Vessels.