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Tactical speed is the maximum speed of a submarine at which it is possible to remain undetected, whilst still having the capability of detecting other ships. Tactical speed is limited by the acoustic noise generated by the ship itself, which affects the ability to detect external sources of sound. One of the main contributors to internal sources of noise is the propulsion system. Tactical speed for modern submarines with nuclear propulsion is at the level of 8–13 knots, but the newest ships of IV generation can achieve tactical speeds over 20 knots. The actual maximum speed of a submarine can be much greater than its tactical speed. For instance, the maximum speed (when submerged) of USS Scranton (SSN-756) is 33 knots, whereas its tactical speed is only 12 knots. == References == * Norman Polmar: Cold War Submarines, The Design and Construction of U.S. and Soviet Submarines. K. J. More. Potomac Books, Inc, 2003. ISBN 1-57488-530-8. 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「tactical speed」の詳細全文を読む スポンサード リンク
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