A.deviation
B.variation
C.compass error
D.northerly error
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A.the compass heading is in line with the lubber's line
B.there is no lost motion in the gimbal rings
C.no change of heading by compass is observed if you raise and lower the heeling magnet
D.the gimbal rings do not strike the compass frame when they are tilted
A.The Flinders bar
B.The heeling magnet
C.Quadrantal soft iron spheres
D.Bar magnets in the binnacle
A.elevation
B.magnetic angle
C.vertical angle
D.dip
A.divisional parts
B.coefficients
C.fractional parts
D.equations
A.compass error
B.latitude
C.variation
D.deviation
最新試題
What is the name of the movable，radial guide line used to measure direction on a radar?（）
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
When crossing the magnetic equator the（）.
What is an advantage of the magnetic compass aboard vessels?（）
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
The most accurate method of determining gyrocompass error while underway is by（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
The Flinders bar on a magnetic compass compensates for the（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
Variation is a compass error that you（）.