37310 - Ship building & Repairing (Miscellaneous)
37311 - Nonpropelled ships, New construction
3731101 - - Military & Nonmilitary hopper barges
3731102 - - Military & Nonmilitary tank barges
3731103 - - Military & Nonmilitary covered cargo barges
3731104 - - Military & Nonmilitary deck barges
3731105 - - Military & Nonmilitary dredges
3731106 - - Military & Nonmilitary: Floating docks
3731107 - - Military & Nonmilitary drilling/production platforms
3731109 - - Nonpropelled ships, New construction: Military & Nonmilitary: Other
3731111 - - Military + Hopper barges, Tank barges, Covered cargo barges, Deck barges, Dredges, Car floats, etc.
3731119 - - Other Military & Nonmilitary nonpropelled ships (incl Dredges & Floating docks) New construction
3731121 - - Nonmilitary: Hopper barges
3731131 - - Nonmilitary: Tank barges
3731141 - - Nonmilitary: Covered cargo barges
3731151 - - Nonmilitary: Deck barges
3731161 - - Nonmilitary: Dredges
3731175 - - Nonmilitary: Drilling platforms
3731181 - - Nonmilitary: other Nonmilitary, Nonpropelled vessels
3731199 - - Nonpropelled ships, New construction (Miscellaneous)
37312 - Self-propelled new ships, Military + Combat ships, Troop transport vessels, Fleet auxiliaries, Service craft, etc. + Hovercraft
37313 - Self-propelled ships, Nonmilitary, New construction
3731310 - - Yachts: <26ft length
3731312 - - Yachts: 26-40ft length
3731314 - - Yachts: 40-65ft length
3731315 - - Yachts: =>65ft length (Professional crew)
3731321 - - Self-propelled ferryboats, Nonmilitary, New construction
3731324 - - Nonmilitary: Dry bulk carriers
3731325 - - Nonmilitary: Container ships (Lift on/lift off) & Trailer ships (Roll on/roll off)
3731326 - - Nonmilitary: Tankers
3731328 - - Other Self-propelled ships (incl Container & Trailer ships) Nonmilitary, New construction
3731329 - - Other Ships
3731332 - - Nonmilitary: Fire, Patrol & Pilot vessels
3731333 - - Nonmilitary: Support vessels for Offshore drilling & Mining
3731335 - - Nonmilitary: Self-propelled mobile drill rigs
3731341 - - Commercial fishing vessels: Seiners
3731343 - - Commercial fishing vessels: Trawlers
3731348 - - Other Self-propelled commercial fishing vessels (incl Seiners) Nonmilitary, New construction
3731349 - - Commercial fishing vessels: Other
3731351 - - Tugboats & Towboats: Harbor & Offshore tugs
3731353 - - Tugboats & Towboats: River towboats
3731355 - - Tugboats & Towboats: Integrated tug/barge combination
3731357 - - Self-propelled tugboats & Towboats, incl Integrated tug/barge combination, Nonmilitary, New construction
3731398 - - Ships (General) + Passenger, Passenger-cargo combo, Ferry boats, etc.
3731399 - - Self-propelled ships, New construction, Nonmilitary (Miscellaneous)
37314 - Ship repair, Military
3731441 - - Ship repair, Military, Conversions & Reconversions
3731449 - - Ship repair, Military, all other Repairs
3731499 - - Ship repair, Military (Miscellaneous)
37316 - Ship repair, Nonmilitary
3731601 - - Ship conversions & Reconversions, Nonmilitary
3731602 - - All other Ship repairs, Nonmilitary
3731613 - - Ship repair, Nonmilitary, Conversions & Reconversions
3731619 - - Ship repair, Nonmilitary, all other Repairs
3731653 - - Ship repair, all other: Conversions & Reconversions
3731659 - - Ship repair, all other: all other Repairs
3731699 - - Ship repair, Nonmilitary (Miscellaneous)
3731XX0 - - Ship building & Repairing (Miscellaneous)
3731XX2 - - Ship building & Repairing (Miscellaneous - Speciality)