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Norddeutscher Lloyd
Norddeutscher Lloyd, known in English as North German Lloyd, was a major German shipping company founded in Bremen in 1857 and merged with Hapag in 1970.
North Carolina-class battleship
The North Carolina class was a pair of United States Navy fast battleships, USS North Carolina and USS Washington, the first built after the 1922 treaty building holiday.
North Korean destroyer Choe Hyon
The Choe Hyon is a North Korean guided-missile destroyer, the lead ship of its class and the largest surface combatant North Korea has built, commissioned in 2026.
North Korean destroyer Kang Kon
The North Korean destroyer Kang Kon (강건) is the second Choe Hyon-class guided-missile destroyer, which capsized at its 2025 launch and was commissioned at Wonsan in 2026.
North Sea Continental Shelf cases
The North Sea Continental Shelf cases were two joined proceedings before the International Court of Justice, decided on 20 February 1969, holding that the equidistance method was not obligatory.
Northern Sea Route
The Northern Sea Route is a roughly 5,600-kilometer shipping lane along the Russian Arctic coast, from the Kara Strait to the Bering Strait, crossing five Arctic seas.
Norwegian Aqua
Norwegian Aqua is a cruise ship operated by Norwegian Cruise Line, delivered in 2025 as the first Prima-Plus Class vessel, known for the Aqua Slidecoaster.
Norwegian Cruise Line
Norwegian Cruise Line, originally Norwegian Caribbean Line, is a Miami-based cruise line founded in 1966 by Knut Utstein Kloster and Ted Arison, credited with launching the modern cruise industry.
Norwegian Cruise Line Holdings
Norwegian Cruise Line Holdings is a Miami-based cruise company operating Norwegian Cruise Line, Oceania Cruises, and Regent Seven Seas Cruises, the world's third largest cruise operator.
Norwegian Epic
Norwegian Epic is a cruise ship operated by Norwegian Cruise Line, built in Saint-Nazaire, France, and delivered in 2010 as the sole vessel of its Epic Class.
Norwegian Joy
Norwegian Joy (喜悦号; Xǐ Yuè Hào) is a cruise ship of Norwegian Cruise Line's Breakaway Plus class, delivered in 2017 and first built for the Chinese market.
Norwegian Luna
Norwegian Luna is a cruise ship operated by Norwegian Cruise Line, delivered by Fincantieri in March 2026 as the second Prima Plus Class ship and sister to Norwegian Aqua.
Notice of readiness
A notice of readiness (NOR) is the master's formal statement to a charterer that the vessel has arrived and is ready in all respects to load or discharge cargo.
NRP D. João II
NRP D. João II is a multifunctional naval platform built for the Portuguese Navy by Damen Shipyards in Romania, named for the 15th-century Portuguese king and due for delivery in 2027.
NS Savannah
The NS Savannah, launched in 1959 under Eisenhower's Atoms for Peace program, was the world's first nuclear-powered merchant ship, serving from 1962 to 1970 and now awaiting decommissioning in Baltimore.
Nuclear marine propulsion
Nuclear marine propulsion, also called naval nuclear propulsion, uses a shipboard nuclear reactor to drive a vessel's turbines, freeing it from refueling and, for submarines, from air.
Nuclear navy
A nuclear navy propels its ships and submarines with onboard nuclear reactors; the United States Navy created the first one in the 1950s under Hyman G. Rickover.
Nuclear submarine
A nuclear submarine is a submarine powered by a nuclear reactor rather than diesel engines, freeing it from snorkeling for air; USS Nautilus made the first nuclear voyage in 1955.
Nuclear-powered icebreaker
A nuclear-powered icebreaker is a surface ship driven by nuclear reactors, giving it the power to break thick sea ice and years of operation without refueling.
Nuestra Señora de Atocha
Nuestra Señora de Atocha was a Spanish treasure galleon that sank in a hurricane off Key West in 1622 and was rediscovered by Mel Fisher in 1985.
Nuestra Señora de las Mercedes (ship)
Nuestra Señora de las Mercedes was a Spanish Navy frigate built at Havana in 1788 and sunk by a British squadron off Cádiz in 1804.
NYK Line
NYK Line (Nippon Yusen Kaisha, 日本郵船) is a Japanese shipping and logistics group founded in 1885, headquartered in Tokyo and operating a fleet of 886 vessels.
Oasis of the Seas
Oasis of the Seas is a Royal Caribbean cruise ship that was the largest ever built at its 2009 debut and introduced the seven-neighborhood design.
Oasis-class cruise ship
The Oasis class, also called the Genesis class, is a class of Royal Caribbean cruise ships whose lead ship, Oasis of the Seas, was the world's largest in 2009.
Ocean class
The Ocean class was a class of sixty British-design cargo ships built in the United States in 1941 and 1942, and the forerunner of the Liberty ship.
Ocean liner
An ocean liner, also called a transatlantic liner, is a passenger ship built to carry people, mail, and cargo across oceans on fixed, published timetables, unlike cruise ships.
Ocean Network Express
Ocean Network Express (ONE) is a Singapore-headquartered container shipping company formed by "K" Line, Mitsui O.S.K. Lines, and Nippon Yusen Kaisha, with services starting in April 2018.
Ocean Ranger
The Ocean Ranger was a semi-submersible offshore drilling rig owned by ODECO that capsized and sank off Newfoundland on February 15, 1982, killing all 84 aboard.
OceanGate
OceanGate was an American company founded in 2009 by Stockton Rush and Guillermo Söhnlein that operated submersibles for tourism and exploration, including dives to the Titanic wreck.
Octopus (yacht)
Octopus is a 126-meter explorer motor yacht built by Lürssen in 2003 for Microsoft co-founder Paul Allen, later used in the discovery of the battleship Musashi.