董事任期由公司章程规定，但每届任期不得超过（）年。

A.when a new Master assumes command

B.daily，at 0800 local zone time

C.weekly，before 2400 Saturday

D.immediately after assuming the watch

A.A vessel towing by pushing ahead

B.A power-driven vessel，not towing

C.A barge being pushed ahead

D.Either answer A or answer B

A.which is not and has not been

B.which was not

C.which was

D.which is not but will be taken by the salver

If practical, when shall a manned vessel being towed sound her fog signal？______.

A.Immediately before the towing vessel sounds hers

B.Immediately after the towing vessel sounds hers.

C.As close to the mid-cycle of the towing vessel’s signals as possible

D.At any time as long as the interval is correct

A.the masthead lights for a towing vessel

B.the lights for a vessel restricted in its ability to maneuver

C.sidelights，stern light and towing light

D.All of the above

A.The Officer in Charge，Marine Inspection

B.The Master，or person in charge of the vessel

C.The vessel's owner or manager

D.The company's port captain or port engineer

A.exonerate

B.exhaust

C.exercise

D.examine

A.need not show the lights for a vessel engaged in towing，if it is impractical to do so

B.may show the lights for a vessel not under command

C.must show a yellow light above the stern light

D.must show the lights for a vessel towing

A.not under command

B.retricted in her ability to maneuver

C.engaged in towing

D.Fishing

A.anyone involved in the casualty

B.any governmental official authorized to investigate the casualty

C.the local Captain of the Port

D.All of the above