Deep-draught vessels and VLCCs shall allow for（）of at least 3.5 m at all times during the entire passage through the Straits of Malacca and Singapore.<br>A:a draft<br>B:a freeboard<br>C:an air draft<br>D:an under-keel clearance

Deep-draught vessels and VLCCs shall allow for（）of at least 3.5 m at all times during the entire passage through the Straits of Malacca and Singapore.
A:a draft
B:a freeboard
C:an air draft
D:an under-keel clearance

出自：海船船员证

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