Roy Maull wrote:
(snip)
Declination is the angle of a heavenly body with the earths horizon
Variation is the offset of magnetic north to true north a some location
Deviation is the amount of correction persuant to a particular compass at
different points around the compass dial, it is not necessarily the same
all the way around.
(snip)
> Hurrah for recurring threads and all the various permutations there of!!!!!
>
Yeah, but in addition to declination, variation, and deviation, pilots wantto add to
this thread the addition of a wind vector and call it heading, and
I presume the sailors want to add a vector for currents and will want to
call it something -- so the permutations go on and on. Guess we
finally have to account for drift around the milky way and thru
time, etc.
Lyn, W4WDN
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