Armed yacht

An armed yacht was a yacht that was armed with weapons and was typically in the service of a navy. Their speed and maneuverability made them useful as patrol vessels. In the United States Navy armed yachts were typically private yachts expropriated for government use in times of war. Armed yachts served as patrol vessels during the Spanish-American War and World War I. In the latter conflict, armed yachts were used as patrol vessels, convoy escorts, and in anti-submarine duties. In the United States, yachts were purchased from their owners with the owners given an option to repurchase their yacht at the close of hostilities.

Notable armed yachts

Canada

HMCS Ambler (Q11)
HMCS Beaver (S10)
HMCS Caribou (S12)
HMCS Cougar (Z15)
HMCS Raccoon
HMCS Otter

United States

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Modern naval ships and warships

List of naval ship classes in service submarine auxiliary

Aircraft carriers	Aircraft cruiser Amphibious assault ship Anti-submarine warfare carrier Balloon carrier CAM ship Escort carrier Fighter catapult ship Fleet carrier Helicopter carrier Light aircraft carrier Merchant aircraft carrier Seaplane tender Submarine aircraft carrier Supercarrier

Battleships	Coastal defence ship Dreadnought Fast battleship Pre-dreadnought battleship Super-dreadnought (Standard-type battleship) Treaty battleship

Cruisers	Armored cruiser Battlecruiser Flight deck cruiser Heavy cruiser Pocket battleship Light cruiser Merchant raider Protected cruiser Strike cruiser Unprotected cruiser

Escort	Aviso Convoy rescue ship Destroyer Destroyer escort Destroyer leader Frigate Guided missile destroyer Kaibokan Sloop

Transport	Amphibious transport dock Amphibious warfare ship Attack transport Dock landing ship Landing craft Landing craft carrier Landing ship heavy Landing ship, infantry Landing ship medium Landing ship support, large Landing ship, tank Landing ship vehicle Troopship

Patrol craft	Armed boarding steamer Armed yacht Coastal motor boat Corvette Gunboat Harbour defence motor launch Motor launch Naval drifter Naval trawler Ocean boarding vessel Patrol boat Q-ship Steam gun boat Submarine chaser Torpedo boat

Fast attack craft	E-boat MAS MGB Missile boat MTB MTM MTSM PT boat Shinyo

Mine warfare	Danlayer Destroyer minesweeper Mine countermeasures vessel Mine planter Minehunter Minelayer Minesweeper

Command and support	Amenities ship Ammunition ship Auxiliary repair dock Auxiliary ship Collier Combat stores ship Command ship Crane vessel Depot ship Destroyer tender Dispatch boat Fast combat support ship General stores issue ship Hospital ship Net laying ship Repair ship Replenishment oiler Submarine tender

Submarines	Attack submarine Ballistic missile submarine Coastal submarine Cruise missile submarine Cruiser submarine Deep-submergence vehicle DSRV Fleet submarine Midget submarine U-boat

Miscellaneous	Arsenal ship Barracks ship Breastwork monitor Flagship Guard ship Littoral combat ship Monitor River monitor Training ship