A.GPS
B.GMDSS
C.AIS
D.Navtex
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A.Black
B.Blue
C.Red
D.White
A.flux
B.poles
C.magnets
D.azimuth
A.If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets
B.If the blue ends of the magnets are aft you should lower the fore-and-aft tray
C.If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets
D.If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnets
A.hammering and jarring
B.vibration and pounding
C.varying magnetic fields
D.stable or permanent magnetism of the ship
A.variation
B.deviation
C.variation and deviation
D.a correction for the direction of current set
最新試題
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
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.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.