A.estimated position
B.dead reckoning position
C.fix
D.None of the above
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A.dead-reckoning position
B.running fix
C.estimated position
D.fix
A.fix
B.dead-reckoning position
C.running fix
D.probable position
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
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
最新試題
A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.
Many of the lights on this coast are placed so high as to be frequently obscured by（）.
After jacking down your liftboat you have an unexpected list.You find that the only cause of this list must be a flooded leg.Your next course of action should be to（）.
Aboard a survival craft，ether can be used to（）.
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
Light Lists for coastal waters are（）.
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 （）.
Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.