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    Re: Infrared sextant
    From: Paul Dolkas
    Date: 2014 Aug 29, 22:03 -0700

    I imagine it would. But it would have all the problems of a visual sighting – you could get false horizons if there was an inversion layer or a warm set of clouds. The FLIR sees heat, after all. Interesting idea though.

     

     

    Paul Dolkas

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Jackson McDonald
    Sent: Sunday, August 24, 2014 4:01 PM
    To: paul@dolkas.net
    Subject: [NavList] Re: Infrared sextant

     

    Could FLIR technology be applied to a sextant scope to enable one to view the natural horizon after dark, thereby extending one's ability to take celestial sights at night, beyond the usual periods of nautical twilight?  

     

     


    On Aug 24, 2014, at 10:42, "Noell Wilson" <NoReply_Wilson@fer3.com> wrote:

    Interesting old sextant on eBay:

     

    HISTORIC MACNEIL ALL WEATHER SEXTANT Ca1932 - CASED EXCELLENT CONDITION

    Built by Hughes, it apparently concentrated infrared energy and allowed sun shots on overcast days. 

    Regards

    Noell

       
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