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
When a magnetic compass is not in use for a prolonged period of time it should（）.
What is the basic principle of the magnetic compass（）.
Variation in a compass is caused by（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
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.
This induced magnetism（）the permanent magnetism already present in the ship.
When changing from a compass course to a true course you should apply（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
What is an advantage of the magnetic compass aboard vessels?（）