Or, you might try this:
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp
I had to enter long./lat. in decimal format to get it to work.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, July 28, 2010 5:27 PM
Subject: Re: [OM] ET borrowed my cellphone when calling home
> Or you can try to pick up an out-of-date Sectional Chart at the local
> airport. They have the deviation marked on them, and the airport can't
> sell
> them after the expiration date.
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Wednesday, July 28, 2010 5:15 PM
> Subject: Re: [OM] ET borrowed my cellphone when calling home
>
>
>>I haven't a clue about proper navigation but I should think an ordinary
>> compass would work well provided it was corrected for true north. I
>> think that's a fiddly process but, for your purposes, maybe not
>> required. If you know, for example, that the sun will be setting at 296
>> degrees (probably close for your location) just wait for the sun to set
>> and adjust the compass off magnetic north until you get a reading of 296
>> degrees and note how far you had to move it (maybe a few degrees). Then
>> you'll have the correction for the future from that location. My guess
>> is that it will probably be close enough that a movement within a radius
>> of 10 miles or so won't change it much... at least relative to the 1/2
>> degree apparent diameter of the sun.
>>
>> Chuck Norcutt
>>
>>
>> Joel Wilcox wrote:
>>> On Wed, Jul 28, 2010 at 1:18 PM, Ken Norton <ken@xxxxxxxxxxx> wrote:
>>>> I did load up the desktop version of the program onto my laptop. Works
>>>> as advertised--which is very well. But honestly, the interface of the
>>>> iPxxxx devices really brings this type of program to life. It's a
>>>> whole new ballgame.
>>>>
>>>> Regardless, both versions get the Schnozz's "highly recommended" label
>>>> with four out of five lens-caps.
>>>
>>> I've goofed around with the freebie laptop version. Before I plunk
>>> down actual $$$ for the app, I need to ask you a dumb-ish question:
>>> it appears that you will need a device once you get "coordinates" for
>>> the sunrise or moonrise. Is a garden-variety compass the correct
>>> device, or is there something superior?
>>>
>>> Joel W.
>> --
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>>
>
>
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