A.fix
B.running fix
C.estimated position
D.dead-reckoning position
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A.estimated position
B.dead reckoning position
C.fix
D.None of the above
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
最新試題
An orange flag showing a black circle and square is a（）.
Mean high water is the average height of（）.
After being rescued from the vessel accident，the people agreed that they had much to（）.
A person who sees someone fall overboard should（）.
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（）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.
Light Lists for coastal waters are（）.
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（）.
Aboard a survival craft，ether can be used to（）.