A.elevation
B.magnetic angle
C.vertical angle
D.dip
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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
A.reduce the variation as much as possible
B.reduce the deviation as much as possible
C.reduce the magnetic dip as much as possible
D.allow the compass bowl to swing freely on its gimbals
最新試題
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
When relieving the helm，the new helmsman should know the（）.
Variation is a compass error that you（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
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（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
While in drydock your vessel will be belt-gauged.This process involves（）.
When crossing the magnetic equator the（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.