单选题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.Aa draftBa freeboardCan air draftDan under-keel clearance
单选题
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
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