干舷是指船舶中部由满载吃水线到甲板上缘的垂直距离。船舶最小干舷是保证船舶安全浮于水面的限度，所有船舶都是按国家船舶检验局勘定的船舶载重线所规定的最小干舷。如果船舶超载、干舷减小到小于规定的限度时，船舶就不能安全浮于水面，故最小干舷也叫安全干舷。
n. freeboard ; upperworks
夏季干舷 Summer freeboard
干舷甲板 [船] freeboard deck
干舷标志 Free Board Mark ; Plimsoll line ; load line marks ; load marks
最小干舷 minimum freeboard ; least freeboard
干舷证书 CERTIFICATE OF FREEBOARD ; [船] freeboard certificate ; load line certificate ; cermet of freeboard
干舷规则 [船] freeboard rule ; freeboard regulation
干舷部 topside
热带干舷 tropical free board
强度干舷 strength freeboard
除木材外各干舷的淡水宽限为158毫米。
Allowance for fresh water for all freeboard other than timber 158mm.
干舷标志由钢板制成，焊接在船上，并且涂漆。
The freeboard marks are made of the steel plate, welded and painted on both sides of the ship.
上部箱体16基本上开启在顶部空间或干舷上。
The upper chamber 16 is an essentially open head space or freeboard.
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