Question 633Navigation General70% to pass
What is the difference between magnetic heading and compass heading called?
AI Explanation
The correct answer is A) deviation.
The difference between magnetic heading and compass heading is called deviation. Deviation is the difference between the compass reading and the true, or magnetic, heading caused by the magnetic fields of the ship's metal components. This causes the compass to deviate from the actual magnetic north. The other options are incorrect - drift refers to the effect of wind and current on a vessel's course, variation is the difference between true north and magnetic north, and compass error encompasses both deviation and variation.
Related Questions
#631 If the compass heading and the magnetic heading are the same then _______________.#632 If the magnetic heading is greater than the compass heading, what direction is the deviation? #634 Deviation is the angle between the _______________.#635 The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is _______________.#636 The compass deviation changes as the vessel changes _______________.