Question 646Navigation General70% to pass
Compass error is equal to the _______________.
AI Explanation
The correct answer is C) combined variation and deviation.
Compass error is the combined effect of variation (the angle between true north and magnetic north) and deviation (the angle between magnetic north and the compass north due to the influence of the ship's magnetic fields). The total compass error is the combination of these two factors, which is why the correct answer is the combined variation and deviation.
The other options are incorrect because:
A) is only the difference between true and magnetic heading, not the full compass error.
B) is incorrect because variation plus compass course does not account for deviation.
D) is incorrect because deviation minus variation does not capture the full compass error.
Related Questions
#644 The compass error of a magnetic compass that has no deviation is _______________.#645 The standard magnetic compass heading differs from the true heading by _______________.#647 When changing from a compass course to a true course you should apply _______________.#648 The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply? #649 The chart indicates the variation was 3°45'W in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?