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单选题
Insufficient space between the hull and bottom in shallow water will prevent normal screw currents resulting in （）.
A
waste of power
B
sudden sheering to either side
C
sluggish rudder response
D
All of the above
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单选题Air gap is the vertical distance between the bottom of the hull and the（）.A
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单选题A common occurrence when a vessel is running into shallow water is that（）.A
the wake is less pronouncedB
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adding weight low in the vesselC
closing crossover valves between partly filled double bottom tanksD
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单选题The distance between the bottom of the hull and the waterline is called （）.A
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单选题The double bottom in a vessel is a space comprised of （）A
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