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
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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
A.into the wind
B.away in fire and smoke
C.directly to the standby boat
D.directly to the nearest land
最新試題
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
Which compensates for errors introduced when the vessel heels over（）.
Variation is the angular measurement between（）.
The most accurate method of determining gyrocompass error while underway is by（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When relieving the helm，the new helmsman should know the（）.
What is an advantage of the magnetic compass aboard vessels?（）
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
Which statement about the gyrocompass is FALSE（）.