Question 643Navigation General70% to pass
If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?
AI Explanation
The correct answer is C) Compass error and variation are equal.
If a magnetic compass is not affected by any magnetic field other than the Earth's, then the only compass error present would be variation - the angle between true north and magnetic north. Since there is no deviation (error caused by local magnetic fields), the compass error and variation would be equal. The other options are incorrect because: A) Compass north will not be true north if variation is present; B) Variation and deviation are separate compass errors; and D) There will be compass error (variation) if the Earth's magnetic field is the only one affecting the compass.
Related Questions
#641 Magnetic variation changes with a change in _______________.#642 Variation is not constant; it is different with every change in _______________.#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 _______________.#646 Compass error is equal to the _______________.