A ship can request completion of a （） when the ship is at a higher security level than the port facility or another ship it is interfacing with.<br>A:DOC<br>B:DOS<br>C:SSP<br>D:SMC

A ship can request completion of a （） when the ship is at a higher security level than the port facility or another ship it is interfacing with.
A:DOC
B:DOS
C:SSP
D:SMC

出自：海船船员证

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