吃水深度(英语:draftdraught),简称吃水,是指船舶在水中沉入水下部分的最深长度,不同船舶有不同的吃水深度。而同一船舶亦根据不同的载重量及所处水域的盐度,而吃水深度有所不同。大型船舰会因为吃水太深而不能够进入水浅之海湾港口或者运河。船身外刻吃水线刻度,以显示吃水深度。

显示吃水线的水呎

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