海防,海口及沿海要地的防務[1],指在沿海地區、領海及管轄海域進行的軍事防務,包括其對應的制度與行為[2],或指為防止軍事攻擊或接近海岸線而採取措施[3],如防禦工事和海岸炮等。因為入侵者通常需要一個港口或海港來維持運作,防衛鬥爭通常會圍繞此類設施或由此類設施構建之地進行[4] 。
參考
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