Join Date: Sep 2013
Location: Columbus, Ga
Thanked 190 Times in 185 Posts
Rep Power: 4
Re: Magnetic Variance
Well since no one's said it, and at the risk of outdated PCness, I'll repeat the jingles I learned back in Power Squadron and around the docks:
To get from From True to the Compass course to steer, you add Westerly error and subtract Easterly error. So, it's True, + - Variation = Magnetic, which + - Deviation =
Compass (and you add Westerly error and subtract easterly error for both variation and deviation, so in shorthand it's:
"TVMDC--Add W", (meaning True, Variation, Magnetic, Deviation, Compass, and add Westerly errors)
How to remember?? as the old non-PC sailors said,
"True Virgins Make Dull Companions--Add Whiskey"
And to go the opposite way, from Compass to True, it's ("CDMVT, Add E") or the jingle"
"Can Dead Men Vote Twice--At Elections?" (here in Louisiana, of course the answer is yes, ha ha)
There may be a more modern set of jingles, but True Virgins and Dead Men is what I grew up with, and I can remember the jingles when I can't remember the formulas.
when at captains school in ft lauderdale the lady teacher said it was
TIMID VIRGINS MAKE DULL COMPANY ADD WHISKEY
jajaja I see it can change a bit depending on who taught you, jajajaja
Merit 25 sold...Islander 36 still afloat? who knows...Im still in Columbus, and back...I think...jajajaja!!!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.