A.variation
B.deviation
C.compass error
D.drift
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A.compass error
B.variation
C.magnetic dip
D.deviation
A.zero
B.equal to variation
C.eliminated by adjusting the compass
D.constant at any geographical location
A.geographical position
B.speed
C.heading
D.longitude
A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
A.induced magnetism in the vessel's horizontal soft iron
B.change in the magnetic field when the vessel inclines from vertical
C.permanent magnetism of the vessel
D.magnetic fields caused by electrical currents in the vicinity
最新試題
When crossing the magnetic equator the（）.
Which statement about the gyrocompass is FALSE（）.
What is the basic principle of the magnetic compass（）.
Variation is the angular measurement between（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
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.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
The line which connects the points of zero magnetic dip is（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.