A.dump valve
B.deflector
C.separator
D.diverter
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A.poor fix
B.good fix
C.poor signal quality
D.good signal quality
A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5° With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed
A.two red lights
B.one green light
C.one white light
D.one amber light
A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
A.straight line
B.arc
C.parabola
D.hyperbola
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After launching，an inflatable raft should be kept dry inside by（）.
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 orange flag showing a black circle and square is a（）.
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（）.
On an Atlantic Ocean voyage from New York to Durban，South Africa，you should expect the Agulhas Current to present a strong（）.
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.
Admiralty EasyTide（）.
To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
Aboard a survival craft，ether can be used to（）.