O

		Name	Type
		O'Bannon DD-987	Destroyer
		O'Brien DD-725	Destroyer
		Oak Express (Ex- Pacific Duchess 2009)	Tanker
		Oakglen (Ex- T. R. McLagan 1954)	Bulk Carrier
*		Oakgrove (1906)	Freighter
		Ocean	Battleship
		Ocean	Aircraft Carrier
		Ocean L-12	Assault Helicopter Carrier
		Ocean Atlantic (Ex-Konstantin Chernenko 1986)	Ro-Ro / Passenger
*		Ocean Courage (1942)	Liberty (U.K.)
		Ocean Moonbeam (2004)	Tanker
		Ocean Princess (Ex- R Four 1999)	Passenger
		Ocean Princess (2000)	Passenger
		Ocean Shield	Offshore Support Vessel
		Ocean Sunrise (2004)	Tanker
		Ocean Village Two (Ex- Crown Princess 1990)	Passenger
		Oceana (1888)	Passenger
		Oceana (Ex- Ocean Princess 2000)	Passenger
		Ocelot S-17	Submarine
		Octavia J-290	Minesweeper
		Odessa Sky (Ex- Gruziya 1975)	Passenger
		Ohio BB-12	Battleship
		Ohio BB-68	Battleship
		Oklahoma BB-37	Battleship
*		Oklahoma (1940)	Tanker
		Old Colony (1904)	Sidewheel
		Oldenburg	Battleship
		Oleg	Protected Cruiser
*		Olivegrove (1929)	Freighter
		Oliver Hazard Perry FFG-7	Frigate
		Olympic (1911)	Passenger
		Olympic (Ex- Empress of Britain 1956)	Passenger
		Olympic Splendour	Tanker
		Omaha SSN-692	Submarine
		Onami DD-111	Destroyer
*		Ondine	Submarine
*		Oneida	Screw Sloop of War
		Oneida	Steam Yacht
*		Oneida (1919)	Transport (Freighter)
*		Oneida (1920)	Freighter
		Onslow S-60	Submarine
		Ontario	Cruiser
*		Onward Ho (1907)	Steam Trawler
		OOCL America (1995)	Containership
		OOCL California (1995)	Containership
		OOCL Houston (2007)	Containership
		OOCL Kaohsinug (2006)	Containership
		OOCL Melbourne (2003)	Containership
		OOCL Yokohama (2007)	Containership
		Oosterschelde	Sailing Vessel
		Opal Leader (2007)	Vehicle Carrier
		Opal Naree (Ex- Blue Taurus 1982)	Bulk Carrier
*		Ophelia (1912)	Freighter
		Orage	Torpedo Boat
*		Oregon (1878)	Passenger
		Oregon (1883)	Passenger
		Oregon BB-3	Battleship
		Oregon Fir (1920)	Lumber Schooner
		Oregonian (Ex- Santa Rosa 1917)	Passenger/Cargo
		Oriana (1995)	Passenger
		Orient Queen (1968)	Passenger
		Orient Venus (1990)	Passenger
		Oriental Diamond (2008)	Tanker
		Orinoco (1886)	Passenger
		Oriole (1914)	Cargo
		Orion	Battleship
		Orion (2003)	Passenger
		Oriskany CV-34	Aircraft Carrier
*		Orissa (1894)	Passenger
*		Ormonde FY-782	Minesweeper Trawler
		Orontes (1929)	Passenger
*		Osage	Monitor
		Osaka Maru (1922)	Freighter
		Osijek (1955)	Passenger Ferry
		Osiris S-13	Submarine
		Oster (1908)	Passenger
		Ostfriesland	Battleship
		Otarama (Ex- Ajana 1912)	Cargo (Refrigerated)
*		Othello (1875)	Iron Ship
		Ottawa FFH-341	Frigate
		Otway S-59	Submarine
		Our Svanen (Ex- Mathilde 1922)	Barquentine
		Ouragan	Torpedo Boat
*		Oxley	Submarine
*	Daily Event

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