types:
flagship
the ship that carries the commander of a fleet and flies his flag
hospital ship
a ship built to serve as a hospital; used for wounded in wartime
hulk
a ship that has been wrecked and abandoned
iceboat,
icebreaker
a ship with a reinforced bow to break up ice and keep channels open for navigation
lightship
a ship equipped like a lighthouse and anchored where a permanent lighthouse would be impracticable
minelayer
ship equipped for laying marine mines
minesweeper
ship equipped to detect and then destroy or neutralize or remove marine mines
sister ship
a ship that is one of two or more similar ships built at the same time
slave ship
a ship used to transport slaves from their homes to places of bondage
wreck
a ship that has been destroyed at sea
caravel
a small, light ship with lateen sails and two to four masts; used by Spanish and Portuguese sailors in the 15th and 16th centuries
capital ship
a warship of the first rank in size and armament
corsair
a swift pirate ship (often operating with official sanction)
corvette
a highly maneuverable escort warship; smaller than a destroyer
cruiser
a large fast warship; smaller than a battleship and larger than a destroyer
destroyer escort
warship smaller than a destroyer; designed to escort fleets or convoys
factory ship
a whaling ship equipped to process whale products at sea
frigate
a United States warship larger than a destroyer and smaller than a cruiser
frigate
a medium size square-rigged warship of the 18th and 19th centuries
guard ship
a warship (at anchor or under way) required to maintain a higher degree of readiness than others in its squadron
ironclad
a wooden warship of the 19th century that is plated with iron or steel armor
liner,
ocean liner
a large commercial ship (especially one that carries passengers on a regular schedule)
privateer
a privately owned warship commissioned to prey on the commercial shipping or warships of an enemy nation
sloop of war
a sailing or steam warship having cannons on only one deck
surface ship
a warship that operates on the surface of the water
torpedo boat
small high-speed warship designed for torpedo attacks in coastal waters