A.can use radar information from one object to fix the position
B.should never use radar bearings
C.should only use radar bearings when the range exceeds the distance to the horizon
D.must use information from targets forward of the beam
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A.rot
B.shrink
C.stretch
D.unlay
A.spring line
B.bow line
C.stern line
D.breast line
A.spring line
B.warp line
C.bow line
D.breast line
A.heaving line
B.lead line
C.manrope
D.mooring line
A.at anchor
B.being towed
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D.drilling
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Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.
The international number，location and/or name，geographical co-ordinates，characteristics and intensity，elevation in metres，range in sea miles and description of structure of a light can be found in（）.
A sweep oar is an oar that is（）.
After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.
An inflatable liferaft is hand-launched by（）.
After being rescued from the vessel accident，the people agreed that they had much to（）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.
Mean high water is the average height of（）.
The information on ocean voyage planning with routeing details for powered and sailing vessels is likely found in（）.
Many of the lights on this coast are placed so high as to be frequently obscured by（）.