單項(xiàng)選擇題A stretch where the channel changes from one side of theriver to the other is called a（）.
A.crossing
B.transit
C.transfer
D.passing
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1.單項(xiàng)選擇題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
2.單項(xiàng)選擇題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
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Topside icing that blocks freeing ports and scuppers（）.
題型：?jiǎn)雾?xiàng)選擇題
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.
題型：?jiǎn)雾?xiàng)選擇題
Ice blink is（）.
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A vessel proceeding along the bank of a river or channel has the tendency to（）.
題型：?jiǎn)雾?xiàng)選擇題
An alternating light（）.
題型：?jiǎn)雾?xiàng)選擇題