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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Mag. Variation
From: Brooke Clarke
Date: 2004 Feb 23, 11:04 -0800
From: Brooke Clarke
Date: 2004 Feb 23, 11:04 -0800
Hi: I have seen the terms "Soft Iron" and "Hard Iron" used with reference to calibrating a magnetic compass, like is used in a car. I think "Hard Iron" implies that the iron is acting as a magnet causing an error in the indicated compass bearing that's independent of the heading of the car. I think "Soft Iron" implies that the iron in the car distorts the Earth's magnetic filed causing an error that depends on the car's heading. Can someone tell me if this is correct? Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com
