Question 633Navigation General
70% to passWhat is the difference between magnetic heading and compass heading called?
A
deviation
B
drift
C
variation
D
compass error
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
Q@q.QuestionNumber:In reading a weather map, closely spaced pressure gradient lines would indicate ...
Q@q.QuestionNumber:At 0000 you fix your position and plot a new DR track line. At 0200 you again fi...
Q@q.QuestionNumber:If you are sailing from the East Coast of the United States to the Caribbean Sea...
Q@q.QuestionNumber:Under the IALA Buoyage Systems, safe water marks may show a _______________.
Q@q.QuestionNumber:The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea...
Ready to test your knowledge?
Take a Navigation General Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App