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## [TowerTalk] compass question

 To: [TowerTalk] compass question bill@axelrods.org (Bill Axelrod) Mon Feb 10 22:51:47 2003
 ```We used to use "East is least, West is best" Bill K3WA ----- Original Message ----- From: "Jim Lux" To: Sent: Monday, February 10, 2003 7:58 PM Subject: Re: [TowerTalk] compass question > To: > >Date: Mon, 10 Feb 2003 16:49:06 -0800 > >To: "RICHARD BOYD" > >From: Jim Lux > >Subject: Re: [TowerTalk] compass question > > > >Everybody has a different conceptual picture of how to remember this, so > >try a variety of mnemonic devices until you find one that works. > > > >Depends if you are west or east of the Agonic Line (i.e. the line on which > >the deviation = 0).. In your case, you are east of the line, so the > >deviation is west.. (that is, the direction to Mag north is to the left > >(west) of the direction to true north). So, for you, when the needle > >points to 350, the zero points to true north. > > > >If you remember that the mag north pole is up near Hudson's Bay (70N, > >100W, approx), and mentally think about where that is, vs where the "real > >north pole" is, you can figure it out. > > > >Also, US topographical maps have this indicated, pictorially, at the bottom. > > > >If you have one of those nifty azimuthal equidistant projection maps > >centered on your QTH, you can find True and Mag north poles and just hold > >your compass over the map. > > > >For those who live in the far East(80E longitude),or in the Southern > >Hemisphere, you'll need other conceptual aids... > > > >There are some nice pictures at: > >http://academic.brooklyn.cuny.edu/geology/leveson/core/linksa/magnetic.html > > > > > >Jim, W6RMK > > > > > >At 06:57 PM 2/10/2003 -0500, you wrote: > >>No, this is not the perennial finding true north question. In my area, > >>Maryland, the "magnetic deviation" is about 10 degrees. I can never > >>remember, though, if that means when I have my compass out I should let > >>the needle come to a stop on 350 or on 10 to have zero pointing at true > >>north. Magnetic north is where the needle will point, obviously, and > >>true north is 10 degrees off from that, but I can never remember which > >>way. ? 73 - Rich, KE3Q > > _______________________________________________ > > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. > > _______________________________________________ > TowerTalk mailing list > TowerTalk@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk > > ```
 Current Thread [TowerTalk] compass question, RICHARD BOYD [TowerTalk] compass question, Doug Faunt N6TQS +1-510-655-8604 location of magnetic north pole Re: [TowerTalk] compass question, Jim Lux [TowerTalk] compass question, Chuck Counselman [TowerTalk] compass question, Richard M. Gillingham [TowerTalk] compass question, Jim Lux [TowerTalk] compass question, Bill Axelrod <= [TowerTalk] compass question, gdaught6@stanford.edu [TowerTalk] compass question, Chris BONDE [TowerTalk] compass question, n4kg@juno.com [TowerTalk] compass question, Richard M. Gillingham