A.dead-reckoning position
B.running fix
C.estimated position
D.fix
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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
A.average wind conditions
B.tidal currents
C.magnetic variation
D.average limits of field ice
最新試題
An inflatable liferaft should be manually released from its cradle by（）.
Of the following，（）is not likely found in The Mariners Handbook.
The Coast Radio Stations are found in（）.
The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given 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（）.
What is the use of the books of Admiralty List of Lights and Fog Signals? Their use is to （）.
Mean high water is the average height of（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.
After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.
Aboard a survival craft，ether can be used to（）.