Compass and GEM setting up

[hotspur]

Hello.

Looking for knowledge on setting up a GEM in the bush-I have an observatory,and never really use a tripod mounted GEM these last few years.

But I have a Vixen GP mount I'd like to take on bush trips,and set up for some wide field,with landscapes etc.

I need recommendations on a good compass (No- I do not have an apps pod,nor do I want one),So can anyone recommend a good old fashion style compass?

Also,what is rough reading to PA-is it 12 degrees to the left of what show south?-as I say its been along time,since I've had to go in the field to do all this.

Thanks for any advice-cheers Chris

[h0ughy]

http://www.iceinspace.com.au/forum/showthread.php?t=14036&highlight=polar+alignment

[GeoffW1]

Hi,

I use one of these

http://www.ebay.com.au/itm/Military-Style-Green-Liquid-Filled-Navigation-Compass-/110637901047?pt=AU_Sport_Camping_Hi king_Compasses&hash=item19c28864f7

It goes well. It has no internal illumination however, and a dim red LED would be handy.

Magnetic declination, or deviation, varies from place to place, but for the East coast of Oz it is 11-12 degrees.

http://www.astroshop.com.au/guides/polar-align-basic.pdf

When looking for true South, it is therefore 11-12 degrees East of magnetic South.

Cheers

[hotspur]

Thank you David and Geoff.:thanx:

Wowa-that Dennis sure is a clever chap-really is invention of the year!

I did not expect such amazing perfect details to come forward from my question,but I am glad this wonderful thread link has come up.

cheers Chris:thumbsup: