... and 'track' is the direction the aircraft is actually making good which, like 'course', can be true or magnetic but, by definition, heading is
always magnetic. Except in 'nil wind' conditions, 'track' and 'heading' are
always different. If you happen to be flying
very accurately, then 'track' and 'course' will co-incide, but they are otherwise almost always different.
Mike
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