单项选择题
Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to （）.
A.the effects of beam width
B.limitations on range resolution
C.the pulse length of the radar
D.the multiple-target resolution factor
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相关考题
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单项选择题
Before a Master relieves a Pilot of the conn，the （）.
A.Master should foresee any danger to the vessel on the present course
B.vessel must be in extremis
C.Master should agree to sign a release of liability form
D.Master must first request the Pilot to take corrective action -
单项选择题
An embarked Pilot （）.
A.is a specialist hired for his local navigational knowledge
B.is solely responsible for the safe navigation of the vessel
C.relieves the Master of his duties
D.relieves the officer of the watch -
单项选择题
An anchored vessel on pilotage duty must show which light(s) at night? （）
A.A sternlight only
B.Anchor lights only
C.A white light over a red light only
D.A white light over a red light and anchor lights
