Outward Bound Map & Compass Handbook by Glenn Randall

Author:Glenn Randall
Language: eng
Format: epub
ISBN: 9780762789405
Publisher: Falcon Guides
Published: 2016-03-21T00:00:00+00:00

Correcting for Declination with a Standard Compass

Let’s assume for the moment that you didn’t spend the extra money to buy a set-and-forget compass. (If you did, consider your money well spent and skip ahead to the section below labeled “Using a Set-and-Forget Compass.”) Before you can understand how to correct for declination with a standard baseplate compass, you need to ingrain two facts in your mind. First, every angle that you measure on a map is measured clockwise, with true north as the starting point. The needle is irrelevant. You’re simply using the compass as a protractor. Second, every angle that you measure in the field by placing the needle in the gate of the compass is also measured clockwise, but the starting point is magnetic north.

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