A.Induced magnetism in vertical soft iron
B.Induced magnetism in horizontal soft iron
C.Permanent magnetism in ship's steel
D.Vessel's inclination from the vertical
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A.GPS
B.GMDSS
C.AIS
D.Navtex
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
最新試題
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
Which statement about the gyrocompass is FALSE（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
The Flinders bar on a magnetic compass compensates for the（）.
Which compensates for errors introduced when the vessel heels over（）.
The quadrantal spheres are used to（）.
When changing from a compass course to a true course you should apply（）.