NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Gary LaPook
Date: 2017 Dec 29, 19:26 -0800
And don't forget the astrocompass and they sky compass, both used for checking the accuracy of the directional gyro and the sky compass used especially on polar flights. See prior discussion:
http://www.usaf-nav-history.com/Tools/PolarSkyCompass.jpg
https://navlist.net/Navigation-Fog-LaPook-feb-2007-g2191
http://www.navlist.net/img/102191.imgp2002.jpg
http://www.navlist.net/img/102191.imgp2015.jpg
http://www.navlist.net/img/102191.imgp2012.jpg
http://www.navlist.net/img/102191.imgp2005.jpg
http://www.navlist.net/img/102191.imgp2006.jpg
http://www.navlist.net/img/102191.imgp2017.jpg
https://navlist.net/Sky-compass-polarizing-sunlight-compass-LaPook-nov-2007-g3767
https://navlist.net/Navigation-Fog-LaPook-feb-2007-g2188
https://navlist.net/Sky-compass-polarizing-cunlight-compass-LaPook-nov-2007-g3766
https://navlist.net/Re-Navigation-FogSKY-COMPASS-LaPook-mar-2009-g7656
https://navlist.net/img/102218.sky-compass.pdf
https://navlist.net/Navigation-Fog-LaPook-feb-2007-g2182
https://navlist.net/Navigation-Fog-LaPook-feb-2007-g2188
https://navlist.net/Navigation-Fog-LaPook-feb-2007-g2193
http://content.time.com/time/magazine/article/0,9171,935539,00.html
http://www.polarization.com/compass/compass.html
http://www.polarization.com/viking/viking.html
gl
