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Operation Ivy Bells : ウィキペディア英語版 | Operation Ivy Bells Operation Ivy Bells was a joint United States Navy, CIA, and National Security Agency (NSA) mission whose objective was to place wire taps on Soviet underwater communication lines during the Cold War.〔 ==Background== During the Cold War, the United States wanted to learn more about Soviet submarine and missile technology, specifically ICBM test and nuclear first strike capability. In the early 1970s the U.S. government learned of the existence of an undersea communications cable in the Sea of Okhotsk, which connected the major Soviet Pacific Fleet naval base at Petropavlovsk on the Kamchatka Peninsula to the Soviet Pacific Fleet's mainland headquarters at Vladivostok.〔 At the time, the Sea of Okhotsk was claimed by the Soviet Union as territorial waters, and was strictly off limits to foreign vessels, and the Soviet Navy had installed a network of sound detection devices along the seabed to detect intruders. The area also saw numerous surface and subsurface naval exercises.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Operation Ivy Bells」の詳細全文を読む
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