A.the deviation has been offset by the variation
B.there is something wrong with the compass
C.the compass is being influenced by nearby metals
D.there is no deviation on that heading
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A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
最新試題
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
What is the basic principle of the magnetic compass（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
The quadrantal spheres are used to（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
When crossing the magnetic equator the（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
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.