A.zero
B.equal to variation
C.eliminated by adjusting the compass
D.constant at any geographical location
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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
A.the vessel's heading
B.sea conditions
C.seasons
D.the vessel's position
A.compass error
B.true heading
C.variation
D.deviation
最新試題
The Flinders bar on a magnetic compass compensates for the（）.
Which compensates for errors introduced when the vessel heels over（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
Variation is the angular measurement between（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The line which connects the points of zero magnetic dip is（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
This induced magnetism（）the permanent magnetism already present in the ship.
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（）.