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Jan Mayen-class patrol vessel
The Jan Mayen class is a class of three ice-strengthened offshore patrol vessels built for the Norwegian Coast Guard, replacing the Nordkapp class from the early 1980s.
Jane's Fighting Ships
Jane's Fighting Ships is an annual reference work cataloging the warships of the world's navies, founded by British journalist Fred T. Jane and first published in 1897.
Jang Yeongsil-class submarine
The Jang Yeongsil-class submarine (장영실함) is a class of three 3,600-ton diesel-electric attack submarines for the Republic of Korea Navy, the second batch of the KSS-III program.
Jangada
A jangada is a traditional sailing fishing raft of northeastern Brazil, built from buoyant logs with a single triangular sail, dominant in artisanal sea fishing for about four centuries.
Japan Marine United Corporation
Japan Marine United Corporation (JMU) is a Japanese shipbuilding company headquartered in Yokohama, formed in 2013 through the merger of IHI Marine United and Universal Shipbuilding.
Japanese aircraft carrier Shinano
Shinano (信濃) was a Japanese World War II aircraft carrier converted from the third Yamato-class battleship hull, sunk by USS Archerfish ten days after commissioning in 1944.
Japanese aircraft carrier Shōkaku
Shōkaku (翔鶴) was a fleet aircraft carrier of the Imperial Japanese Navy, lead ship of her class, completed in 1941 and sunk by USS Cavalla in 1944.
Japanese aircraft carrier Taihō
Taihō (大鳳) was an armored-deck fleet carrier of the Imperial Japanese Navy, sunk by a submarine at the Battle of the Philippine Sea in 1944.
Japanese battleship Kongō
Japanese battleship Kongō (金剛), also known as IJN Kongo, was a fast battleship of the Imperial Japanese Navy, built in Britain in 1913 and sunk in 1944.
Japanese battleship Mikasa
The Japanese battleship Mikasa (三笠) was a pre-dreadnought battleship of the Imperial Japanese Navy, built in England and Admiral Tōgō's flagship at the 1905 Battle of Tsushima.
Japanese battleship Mutsu
Mutsu (陸奥) was a Nagato-class battleship of the Imperial Japanese Navy completed in 1921, one of the first battleships to mount 16-inch guns, and destroyed by a magazine explosion in 1943.
Japanese battleship Nagato
Nagato (長門) was an Imperial Japanese Navy battleship, the first warship in the world to carry 16-inch guns, and Admiral Yamamoto's flagship at Pearl Harbor.
Japanese cruiser Chikuma (1938)
Chikuma (筑摩) was a Tone-class heavy cruiser of the Imperial Japanese Navy that scouted for the carriers at Pearl Harbor and Midway before being sunk in 1944.
Jawaharlal Nehru Port
Jawaharlal Nehru Port, also known as Nhava Sheva Port, is a major port at Navi Mumbai, Maharashtra, and India's premier container gateway, commissioned in 1989.
Jean Lafitte
Jean Lafitte, also spelled Laffite, was a French pirate and smuggler who dominated New Orleans commerce and helped win the Battle of New Orleans in 1815.
Jeanneau
Jeanneau is a French boatbuilder founded by Henri Jeanneau in 1957 at Les Herbiers, producing sailing yachts and motorboats, today as a brand of Groupe Beneteau.
Jebel Ali Port
Jebel Ali Port is a container port in Dubai, United Arab Emirates, opened in 1979 and operated by DP World, with the largest container throughput in the Middle East.
Jetty
A jetty is a long, narrow structure, usually of rock, projecting from the shore into a sea, river, or lake, most often in pairs at a harbor entrance.
Jolly Roger
The Jolly Roger is the traditional pirate flag, usually a white skull and crossbones on black, flown from the late 17th century to frighten targets into surrendering.
José Salvador Alvarenga
José Salvador Alvarenga is a Salvadoran fisherman who survived 438 days adrift in the Pacific Ocean before washing ashore in the Marshall Islands in 2014.
Jotun FPSO
The Jotun FPSO is a floating production, storage and offloading vessel in the Norwegian North Sea, serving the Jotun field from 1999 and the Balder area from 2025.
Juan Sebastián de Elcano
The Juan Sebastián de Elcano is the Spanish Navy's four-masted training ship, in service since 1928 and named for the navigator who first circumnavigated the globe.
Juan Sebastián Elcano
Juan Sebastián Elcano, also spelled Elkano or del Cano, was a Basque navigator who completed the first circumnavigation of the Earth, bringing the Victoria back to Spain in September 1522.
Jukung
The jukung is a small traditional Indonesian boat, usually a dugout canoe with double outriggers, used for fishing; in Kalimantan it is a river canoe, notably among the Banjar people.
Junk (ship)
A junk is a Chinese sailing ship distinguished by watertight bulkheads, a sternpost rudder, and battened sails; it served for centuries as a trading vessel across East Asia.
Jury rigging
Jury rigging, also called jury-rigging, is the making of temporary, makeshift repairs with whatever is at hand, originating in sailing, where a jury mast replaces a broken mast.
Kagerō-class destroyer
The Kagerō-class destroyer (陽炎型) was a class of eighteen fleet destroyers built for the Imperial Japanese Navy between 1939 and 1941, designed around heavy torpedo armament.
Kaiten (回天)
Kaiten (回天), a manned suicide torpedo of the Imperial Japanese Navy, was piloted by a single crewman in the final year of World War II.
Kalmar Nyckel
Kalmar Nyckel ("Key of Kalmar"; Dutch: Kalmar Sleutel) was a Dutch-built Swedish ship that in 1638 carried settlers founding New Sweden at Fort Christina, now Wilmington, Delaware.
Kamorta-class corvette
The Kamorta class, also known as Project 28, is a class of four anti-submarine warfare stealth corvettes of the Indian Navy, designed in-house and built by Garden Reach Shipbuilders in Kolkata, commissioned between 2014 and 2020.