A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
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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
A.geographic pole and the magnetic pole
B.lubber's line and true north
C.horizontal and the magnetic line of force
D.compass heading and the magnetic heading
A.varies depending upon the bearing used
B.is the angular difference between magnetic north and compass north
C.is published on the compass rose on most nautical charts
D.is the angular difference between geographic and magnetic meridians
最新試題
Variation is a compass error that you（）.
When changing from a compass course to a true course you should apply（）.
When crossing the magnetic equator the（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
The Flinders bar on a magnetic compass compensates for the（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
Variation is the angular measurement between（）.