A vessel, other than a rescue unit, designated to co-ordinate surface search and rescue operation within a specified area is known as（）.<br>A:salving vessel<br>B:co-ordinator surface search<br>C:mersar<br>D:the vessel being salved

A vessel, other than a rescue unit, designated to co-ordinate surface search and rescue operation within a specified area is known as（）.
A:salving vessel
B:co-ordinator surface search
C:mersar
D:the vessel being salved

出自：海船船员证

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