NOAA has an online calculator for estimating the declination at any
longitude/latitude on a specific date.
https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml
Marsh, KA5M
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Lux, Jim
Sent: Thursday, April 28, 2022 11:01 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Declination - Does it matter?
On 4/28/22 8:50 PM, Ken WA8JXM wrote:
> I would not worry about the tower but I would determine true north
> when mounting a beam, not that 16 degrees will make much difference
> to an HF Yagi
>
> Ken WA8JXM
Is it time to mention that of course the owl faces north, and that's what you
should use as a reference.
BTW, I'd use true north as zero degree reference. Declination is always
changing.
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