A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
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A.straight line
B.arc
C.parabola
D.hyperbola
A.all-round yellow light only
B.all-round white light only
C.all-round blue light only
D.alternating red and yellow light
A.I am in doubt as to your actions
B.My engines are full speed astern
C.I desire to overtake you
D.I am operating astern propulsion
A.should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards
B.should be righted by standing on the life line，holding the righting straps leaning backwards
C.will right itself when the canopy tube inflates
D.must be cleared of the buoyant equipment before it will right itself
A.at the bow
B.at the stern
C.in the middle
D.all around
最新試題
Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.
After being rescued from the vessel accident，the people agreed that they had much to（）.
The Lists of Meteorological Observation Stations can be found in（）.
The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in（）.
Aboard a survival craft，ether can be used to（）.
The information on（）is not likely found in The Mariners Handbook.
An inflatable liferaft is hand-launched by（）.
Mariners not entering the port are（）to keep at least one mile off.
Light Lists for coastal waters are（）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.