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
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which statement about the gyrocompass is FALSE（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
What is the basic principle of the magnetic compass?（）
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）