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Operation Sailor Hat
Operation Sailor Hat was a series of three tests of explosives effects, conducted by the United States Navy on the island of Kahoolawe, Hawaii in 1965.〔(【引用サイトリンク】title=USS England official website )〕 They were non-nuclear tests employing large quantities of conventional explosives (i.e. TNT) to simulate the effects of a nuclear weapon blast, such as the effects upon naval vessels. In addition, seismological data, underwater acoustics, radio communications, cratering, air blast effects, cloud growth, fireball generation, and electromagnetic data were gathered. The light cruiser , the guided-missile destroyer leaders and , the guided-missile destroyers , , and , and the Canadian Navy's escort destroyer all participated in the trial.
Each "Sailor Hat" test consisted of a dome-stacked 500-ton (450 t) charge of TNT high explosive detonated on the shore of Kahoolawe close to the ships under test. Each test saw the USS ''Atlanta'' move closer to the explosion. The first test, called Bravo, occurred on 6 February 1965, with the second test, called Charlie, on 16 April and the last, codenamed Delta, on 19 June.
== Effects ==
Cameras recorded the blast effects inside the ships and have shown that the force of the blast was enough to buckle steel walls and tear off heavy radar equipment and send it flying. Although severely damaged, the ships stayed afloat. In addition, two observation blimps were destroyed high above ground by the shock wave. USS ''England'', which was farthest from the blast center, experienced the least damage, the most serious of which was only a dent where a boulder had hit the ship.
The crater left by the blast is called the "Sailor's Hat" crater and holds an anchialine pool containing ''Halocaridina rubra'' shrimp, which have adapted to the conditions in the crater.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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