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Indian Ocean

(Encyclopedia)Indian Ocean, third largest ocean, c.28,350,000 sq mi (73,427,000 sq km), extending from S Asia to Antarctica and from E Africa to SE Australia; it is c.4,000 mi (6,400 km) wide at the equator. It con...

sonar

(Encyclopedia)sonar sōˈnär [key], device used underwater for locating submerged objects and for submarine communication by means of sound waves. The term sonar is an acronym for sound navigation ranging. The mai...

tsunami

(Encyclopedia)tsunami tso͝onäˈmē [key], series of catastrophic ocean waves generated by submarine movements, which may be caused by earthquakes, volcanic eruptions, landslides beneath the ocean, or an asteroid ...

navy

(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...

Scapa Flow

(Encyclopedia)Scapa Flow skăpˈə [key], area of water, 15 mi (24 km) long and 8 mi (12.9 km) wide, in the Orkney Islands, off N Scotland. It is bounded by the islands of Mainland, Graemsay, Burray, South Ronaldsa...

Bernstorff, Johann Heinrich, Graf von

(Encyclopedia)Bernstorff, Johann Heinrich, Graf von bĕrnsˈtôrf [key], 1862–1939, German diplomat. As ambassador to the United States (1908–17), he tried to conciliate American feelings toward Germany and re...

Theremin, Leon

(Encyclopedia)Theremin, Leon thĕrˈəmən [key], 1896–1993, Russian engineer and inventor, b. St. Petersburg as Lev Sergeyevich Termen. He studied and worked in his native city, attending its university and cons...

Cagliari

(Encyclopedia)Cagliari käˈlyärē [key], city, capital of Sardinia and of Cagliari prov., S Sardinia, Italy, ...

Maine, ship

(Encyclopedia)Maine, U.S. battleship destroyed (Feb. 15, 1898) in Havana harbor by an explosion that killed 260 men. The incident helped precipitate the Spanish-American War (Apr., 1898). Commanded by Capt. Charles...

Hague Conferences

(Encyclopedia)Hague Conferences, term for the International Peace Conference of 1899 (First Hague Conference) and the Second International Peace Conference of 1907 (Second Hague Conference). Both were called by Rus...