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
Variation in a compass is caused by（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
The Flinders bar on a magnetic compass compensates for the（）.
What is the basic principle of the magnetic compass?（）
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
Variation is a compass error that you（）.
What is the basic principle of the magnetic compass（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.