A.The Flinders bar
B.The heeling magnet
C.Quadrantal soft iron spheres
D.Bar magnets in the binnacle
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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
A.precession
B.earth rate
C.gyroscopic inertia
D.gravity effect
A.remove deviation on the intercardinal headings
B.remove deviation on the cardinal compass headings
C.remove heeling error
D.compensate for induced magnetism in vertical soft iron
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
The most accurate method of determining gyrocompass error while underway is by（）.
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
The quadrantal spheres are used to（）.
Variation in a compass is caused by（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
What is the basic principle of the magnetic compass?（）
The line which connects the points of zero magnetic dip is（）.
When changing from a compass course to a true course you should apply（）.