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## [TowerTalk] compass question

 To: [TowerTalk] compass question gdaught6@stanford.edu (gdaught6@stanford.edu) Wed Feb 12 11:22:42 2003
 ```On 10 Feb 2003 at 22:51, Bill Axelrod wrote: > We used to use "East is least, West is best" Nobody has allowed for the fact that the compass itself isn't perfect! It has some "deviation" from the correct direction,and that usually depends on the indicated direction. Here's the full story... (way more than anybody wants to know! I could always get these problems right in the classroom, but under stress at navigating a vessel or aircraft it's less easy!) starting with the true bearing "True virtue makes dull company. Add whiskey." true+variation=magnetic+deviation=compass The plus signs are used for westerly changes ("add whiskey" get it?) If the compass deviation or the local variation are EASTERLY, then use a minus sign. starting with the compass bearing "Can dead men vote twice at elections?" compass+deviation=magnetic+variation=true The plus sign is used for easterly changes ("at elections.") If the variation or the deviation are WESTERLY, then use a minus sign. I, for one, am very happy that an antenna pattern in the contiguous 48 states pretty much washes all of these errors out!! 73, approx 38N, 122W, variation about 15 degrees easterly ```
 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