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
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
Variation is a compass error that you（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
When relieving the helm，the new helmsman should know the（）.
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.
When changing from a compass course to a true course you should apply（）.
What is an advantage of the magnetic compass aboard vessels?（）
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.