Blockage of passage

Japanese: 通峡阻止 - つうきょうそし

Blockade is a type of coastal defense that uses military force to prevent enemy surface ships and submarines from passing through straits or channels through which they are expected to pass. Blockade usually involves deep deployment of mobile forces such as surface ships, aircraft, and submarines, as well as fixed weapons such as radar, underwater detectors, and mines, taking into account the characteristics of the strait area and the situation between the two sides. Ships and aircraft stationed outside the strait usually also serve as coastal defense forces.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

敵の水上艦船および潜水艦の通過が予想される海峡または水道において，軍事力をもってそれら艦船の通過を阻止することで，沿岸防衛における海上封鎖の一分野である。通峡阻止には，通常，水上艦艇，航空機，潜水艦等の可動兵力とレーダー，水中探知機および機雷等の固定兵器を，海峡地域の特徴と彼我の状況等を勘案して組み合わせ，縦深的に配備する。海峡外域に配置する艦艇，航空機等は沿岸防衛のための兵力を兼ねるのが通例である。

出典　株式会社平凡社世界大百科事典第２版について　情報

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