A.follow-up system
B.transmitter
C.phantom element
D.azimuth motor
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A.east
B.west
C.north
D.south
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
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
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
The line which connects the points of zero magnetic dip is（）.
Which statement about the gyrocompass is FALSE（）.
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
Variation in a compass is caused by（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.