A.Comparing the gyro azimuth of a celestial body with the computed azimuth of the body
B.Comparing the gyro heading with the magnetic compass heading
C.Determining from the chart the course made good between celestial fixes
D.It cannot be determined accurately at sea due to drift of unknown currents
您可能感興趣的試卷
你可能感興趣的試題
A.permanent magnetism
B.subpermanent magnetism
C.induced magnetism
D.variable magnetism
A.An agonic line
B.The magnetic equator
C.A magnetic meridian
D.All of the above
A.They are not subject to permanent magnetism; no check is necessary
B.Semiannually
C.Annually
D.Every five years
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
A.GPS
B.GMDSS
C.AIS
D.Navtex
最新試題
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
Variation is a compass error that you（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
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.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）