Before entering the chain locker，you should（）.

单项选择题According（）the report，the ship hit the wharf when berthing.

A.of
B.to
C.for
D.on

单项选择题A vessel showing a yellow light over a white light at night is a vessel（）.

A.engaged in piloting
B.towing astern
C.engaged in fishing
D.in distress

单项选择题A message warning of a tropical storm should be sent as a(n)（）.

A.routine message
B.urgent message
C.distress message
D.safety message

单项选择题A crew member has just fallen overboard off your port side. Which action should you take?（）.

A.Immediately put the rudder over hard right
B.Immediately put the rudder over hard left
C.Immediately put the engines astern
D.Wait until the stern is well clear of the man and then put the rudder over hard right

单项选择题（）of the following messages is allowed to be transmitted on the radiotelephone without the authority of the Master.

A.Urgency signal
B.Safety signal
C.Distress signal
D.None of the above