VESSEL TYPES:

B 	WET BARGES

D	DEEP-SEA VESSEL
	TK = tanker
	PX = passenger
	BC = bulk carrier
	CC = car carrier

F	FISHING BOATS

T	TUGS

Z	MISCELLANEOUS 
	FF = firefighting
	CB = crane barge
	WB = workboat
	CG = US Coast Guard
	NV - naval vessel
	FB = ferry
	RV = research
	HC = harbor cruises / dinner boats
	TV = training vessels
	DR = dredge
	DB - dry barge (pipes etc)
	LE = law enforcement
	WW = whale watch
	PF = party fishing
	RP = replica
	PV = pilot vessel

M	PLEASURE CRAFT (motor)

S	PLEASURE CRAFT (sail)