While in Greenland I was trained to use a polarizing filter to judge the suns location when the sky was obscured by fog or clouds. Worked well. I wonder if it would work with polarized sun glasses? I will have to give it a try. I am in sunny southwest now so it will have to wait awhile.

Compasses were useless most of the time as we were well above the magnetic pole and the earths electrical field was a real mess. Compass would just spin.

I can't remember all the details of the solar polarizing compass. Perhaps there is information on the net.

...........From Nomad.........Been "on the road" since '97