单项选择题
Which action（s）should the operator of a pedestal crane take if crane control is lost （）.
A.Let go of both control levers and return to neutral position
B.Press the emergency stop
C.Notify the mate on watch
D.All of the above
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相关考题
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单项选择题
Which action（s）is/are included in crane operations（）.
A.Normal boom stowage and shutdown operations
B.Emergency shutdown operation
C.Removing booms from stowage
D.All of the above -
单项选择题
What is a“Special Warning”（）.
A.An urgent message concerning a vessel in distress
B.A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels
C.A broadcast disseminating an official government proclamation affecting shipping
D.A radio navigational warning concerning a particularly hazardous condition affecting navigation -
单项选择题
What form of ice is of land origin（）.
A.Shuga
B.Floe
C.Spicule
D.Bergy bit
