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submarine

(Encyclopedia) submarine, naval craft capable of operating for an extended period of time underwater. Submarines are almost always warships, although a few are used for scientific,…

Submarine Volcanoes

Submarine volcanoes and volcanic vents are common features on certain zones of the ocean floor. Some are active at the present time and, in shallow water, disclose their presence by blasting…

Major Submarine Accidents

1957May 22, Atlantic: nuclear-powered submarine Scorpion sank, cause of sinking unknown; 99 dead.1963April 10, North Atlantic: atomic-powered submarine Thresher sank; 129 dead.See also…

Nautilus

(Encyclopedia) Nautilus: see submarine .

Tirpitz, Alfred von

(Encyclopedia) Tirpitz, Alfred von äl´frāt fən tĭr´pĭts [key], 1849–1930, German admiral. His influence on German naval policy began with his study of the recently invented torpedo and…

Groton

(Encyclopedia) Groton grŏt´ən [key], town (1990 pop. 45,144), New London co., SE Conn., including the borough of Groton and the village of West Mystic, on the Thames River opposite New…

periscope

(Encyclopedia) periscope pĕr´ĭskōp [key] [Gr.,=view around], instrument to enable a person to see objects not in his direct line of vision or concealed by some intervening body. Its…

Drebbel, Cornelis Jacobszoon

(Encyclopedia) Drebbel, Cornelis Jacobszoon kôrnā´lĭs yä´kôpsōn drĕb´əl [key], 1572–1634, Dutch inventor, physicist, and mechanician. His major inventions were an atmospherically…

Capelle, Eduard von

(Encyclopedia) Capelle, Eduard von ā´do͞oärt fən käpĕl´ə [key], 1855–1931, German admiral. As secretary for the navy (1916–18) he reinstituted (1917) unrestricted submarine warfare in…

Norwegian Sea

(Encyclopedia) Norwegian Sea, part of the Atlantic Ocean, NW of Norway, between the Greenland Sea and the North Sea. It is separated from the Atlantic by a submarine ridge linking…