A.plane tangent at one point
B.cylinder tangent at one parallel
C.cone tangent at one parallel
D.series of cones tangent at selected parallels
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A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown
A.aground
B.at anchor
C.not under command
D.being towed
A.average wind conditions
B.tidal currents
C.magnetic variation
D.average limits of field ice
A.B flammable liquid
B.C flammable liquid
C.D combustible liquid
D.E combustible liquid
A.should always be immediately corrected
B.will always cause a vessel to capsize
C.always results from off-center weights
D.All of the above are correct
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An inflatable liferaft is hand-launched 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（）.
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（）.
After launching，an inflatable raft should be kept dry inside by（）.
The information on（）is not likely found in The Mariners Handbook.
After being rescued from the vessel accident，the people agreed that they had much to（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
The Lists of Meteorological Observation Stations can be found in（）.