A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brian Walton
Date: 2018 Sep 21, 23:34 -0700
I am at present afloat in my boat, in the eastern Atlantic. The forecast is bad. If I sink tonight, and make it into my liferaft, I will time the moment the rising sun lower limb reaches half a sun’s diameter above the horizon.
No have sextant, no have versines. My longitude will be sun GHA plus 90°.