A、A.compass error
B、B.variation
C、C.magnetic dip
D、D.deviation
更多“The compass heading of a vessel differs from the true heading by（）.”相关的问题
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、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、the compass heading is in line with the lubber's line B、there is no lost motion in the gimbal rings C、no change of heading by compass is observed if you raise and lower the heeling magnet D、the gimbal rings do not strike the compass frame when they are tilted
A、The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings B、After the new heading is reached，the vessel should steam on that course for at least two minutes before the adjustment C、During the course change，you should gently tap the compass to remove any error caused by friction on the pivot bearing D、After steadying on the new heading，the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error
A、Move the quadrantal spheres closer to the compass B、Raise the heeling magnet if the red end is up C、Remove some of the Flinders bar D、Raise or lower the athwartship magnets
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