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    Re: Polar Grid AirNav and Oceanic AirNav
    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

    http://fer3.com/arc/m2.aspx/Navigation-Fog-LaPook-feb-2007-g2191

    http://www.fer3.com/arc/img/102191.imgp2002.jpg

    http://www.fer3.com/arc/img/102191.imgp2015.jpg

    http://www.fer3.com/arc/img/102191.imgp2012.jpg

    http://www.fer3.com/arc/img/102191.imgp2005.jpg

    http://www.fer3.com/arc/img/102191.imgp2006.jpg

    http://www.fer3.com/arc/img/102191.imgp2017.jpg

    http://fer3.com/arc/m2.aspx/Sky-compass-polarizing-sunlight-compass-LaPook-nov-2007-g3767

    http://fer3.com/arc/m2.aspx/Navigation-Fog-LaPook-feb-2007-g2188

    http://fer3.com/arc/m2.aspx/Sky-compass-polarizing-cunlight-compass-LaPook-nov-2007-g3766

    http://fer3.com/arc/m2.aspx/Re-Navigation-FogSKY-COMPASS-LaPook-mar-2009-g7656

    http://fer3.com/arc/img/102218.sky-compass.pdf

    http://fer3.com/arc/m2.aspx/Navigation-Fog-LaPook-feb-2007-g2182

    http://fer3.com/arc/m2.aspx/Navigation-Fog-LaPook-feb-2007-g2188

    http://fer3.com/arc/m2.aspx/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

       
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