For example, even if you are only 5%
off from a standard rate turn (which is hard to tell on the TC), you
will be about 10 degrees off after a 180-turn. In order to fine tune
that heading, one needs to know about compass errors.


No, you do another timed turn. It will be shorter, and (in the above example)
you'll only be off by half a degree. That's plenty good.

Jose

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