A.The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true
B.The readings are too low and the amount of the error must be subtracted from the compass to obtain true
C.The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true
D.The readings are too high and the amount of the error must be subtracted from the compass to obtain true
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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
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
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
When crossing the magnetic equator the（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
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（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
The Flinders bar on a magnetic compass compensates for the（）.