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post #46 of Old 01-31-2014
DRFerron
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Re: Magnetic Variance

Quote:
Originally Posted by Minnesail View Post
... If you are always converting to true it will be second nature to you, ...
That, too. But the general rule of thumb is to plot your fix every half hour. That way you can look at your last known position on your chart and say "At 0800 I was here". The CG can then plug that into their computer, calculate set and drift and know where you *should* be within a matter of seconds. But a SAR operation will start at your last known position.

Donna


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