When adjusting a magnetic compass for

When adjusting a magnetic compass for error，a deviation table should be made（）.

Abefore correcting for any deviation
Bafter correcting for variation
Cafter adjusting the fore-and-aft and athwartships permanent magnets
Dbefore the quadrantal correctors are placed on the compa

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分类：磁罗经与陀螺罗经的使用题库

The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.Anorth magnetic poleBsouth magnetic poleCmagnetic prime vertical meridianDmagnetic equator

2、Magnetic compass deviation（）.

Magnetic compass deviation（）.Avaries depending upon the bearing usedBis the angular difference between magnetic north and compass northCis publish...

3、The error in a magnetic compass caused

The error in a magnetic compass caused by the vessel’s magnetism is called（）.AvariationBdeviationCcompass errorDbearing error

4、When a magnetic compass is not in use

When a magnetic compass is not in use for a prolonged period of time it should（）.Abe shielded from direct sunlightBbe locked into a constant headingChave any air bubbles replaced with nitrogenDhave the compensating magnets removed

5、Before a magnetic compass is adjusted

Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors ...

6、When placed in a magnetic field, which

When placed in a magnetic field, which of the materials listed will maintain the highest permeability?（）AGlassBBakeliteCSoft ironDAluminum

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