A.two red lights
B.one green light
C.one white light
D.one amber light
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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
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
最新試題
Many of the lights on this coast are placed so high as to be frequently obscured by（）.
The latest known details of lights are given in（）.
Light Lists for coastal waters are（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.
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 Lists of Meteorological Observation Stations can be found in（）.
An inflatable liferaft should be manually released from its cradle by（）.
Aboard a survival craft，ether can be used to（）.
After launching，an inflatable raft should be kept dry inside by（）.
What is the use of the books of Admiralty List of Lights and Fog Signals? Their use is to （）.