单项选择题

A stream of water immediately surrounding a moving vessel’s hull，flowing in the same direction as the vessel is known as（）.

A.directional current
B.forward current
C.propeller current
D.wake current

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单项选择题

A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）.

A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard

单项选择题

A SEA ROOM TO BE KEPT FOR SAFETY AROUND A VESSEL，ROCK，PLATFORM，ETC.，OR THE PLACE ASSIGNED TO A VESSEL WHEN ANCHORED OR LYING ALONGSIDE A PIER，ETC means（）.

A.Port
B.Commercial area
C.Berth
D.Roadstead

单项选择题

A flashing red light displayed at a single lock means that the lock（）.

A.is ready to use but vessels must stand clear
B.is ready to use and vessels may approach
C.cannot be made ready immediately and vessels shall stand clear
D.cannot be made ready immediately but vessels may approach