A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
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.
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.