A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
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A.flux
B.poles
C.magnets
D.azimuth
A.permanent magnetism
B.subpermanent magnetism
C.induced magnetism
D.variable magnetism
A.GPS
B.GMDSS
C.AIS
D.Navtex
A.Flinders bar
B.Soft iron spheres
C.Fore-and-aft permanent magnets in their trays
D.Heeling magnet
A.hammering and jarring
B.vibration and pounding
C.varying magnetic fields
D.stable or permanent magnetism of the ship
A.They are not subject to permanent magnetism; no check is necessary
B.Semiannually
C.Annually
D.Every five years
A.compass north and magnetic north
B.compass north and true north
C.magnetic meridian and the geographic meridian
D.your vessel's heading and the magnetic meridian
A.Black
B.Blue
C.Red
D.White
A.variation
B.deviation
C.variation and deviation
D.a correction for the direction of current set
A.an annual
B.a constant
C.a variable
D.an unstable
最新試題
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 the basic principle of the magnetic compass?（）
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
What is an advantage of the magnetic compass aboard vessels?（）
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.
The most accurate method of determining gyrocompass error while underway is by（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
Variation in a compass is caused by（）.
The quadrantal spheres are used to（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.