A.compass error
B.variation
C.magnetic dip
D.deviation
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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
A.the vessel's heading
B.sea conditions
C.seasons
D.the vessel's position
最新試題
The line which connects the points of zero magnetic dip is（）.
The Flinders bar on a magnetic compass compensates for the（）.
When relieving the helm，the new helmsman should know the（）.
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 an advantage of the magnetic compass aboard vessels?（）
When adjusting a magnetic compass for error，a deviation table should be made（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
This induced magnetism（）the permanent magnetism already present in the ship.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.