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Re: Newbie - Variation Question
From: Pierre Boucher
Date: 2002 Feb 14, 18:29 -0500
From: Pierre Boucher
Date: 2002 Feb 14, 18:29 -0500
>Difference between France and Quebec? ;-) I learned > > Cv = Cc + W (True = Magnetic + Variation) > W positive if East > W negative if W > >Fromn that one finds > > Cc = Cv - W > >so that would say subtract too. (Le Cours de Navigation des Glenans, 1990, >says "if the variation is East, it is substracted from the true heading". >Also, when taking sightings, the sentence "Est-ce Plus ou Est-ce Moins (Est >Plus, Ouest Moins)" is used to go from magnetic to true.) CPS (both english and french) and USPS I think teach this mnemonic to remember: West is Best (+),... East is least(-) going from True to Compass >It is the first time I hear about East variation being considered negative, >but this all arithmetic, right? Add the negative quantity, or substract the >positive one, who cares? Elementary my dear Watson!... ;-) By convention: From compass to true East is + and West is - and From true to compass West is + and East is -. This being said: That MLR GPS as gone "bezerk ************************************************************************** X XX X Pierre Boucher N XXX XX formation en navigation de plaisance XXXX XXX Ste-Therese (Quebec) Canada XXXXX XXX XXXXXX XXX la "VOILE"... le reste n'est que du vent... XXXXXXXXXXXXXX ''Sail, Sail !''... the rest is only wind XXXXXXXXXXXX XXXX EMAIL: pboucher@lavoile.com XXX "http://www.lavoile.com" **************************************************************************