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单选题
（） is (are) not power supplied by main switchboard directly.
A
Steering gear and windlass
B
Navigation light and radio power panel
C
Navigation device power box
D
Daily fresh water pump
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Steering gear and windlassB
Navigation light and radio power panelC
Navigation device power boxD
Daily fresh water pump
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单选题（）is not a vessel restricted in her ability to maneuver．A
A vessel engaged in laying，servicing or picking up a navigation mark，submarine cable or pipelineB
A vessel engaged in dredging，surveying or underwater operationsC
A vessel engaged in replenishment or transferring persons，provisions or cargo while underwayD
A power driven vessel which because of her draught in relation to the available depth and width of navigation water is severely restricted in her ability to deviate from the course she is following
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