NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lost at Sea with a sextant puzzle
From: Brad Morris
Date: 2019 Jun 25, 14:53 -0400
From: Brad Morris
Date: 2019 Jun 25, 14:53 -0400
Here is a video showing the mirror with the × I alluded to. Complete instructional video and explanation.
Jump to 3:20 to see the ×
Jump to 5:51 to see a diagram of the aiming principle
Jump to 8:29 to see description of beam width and signaling range. The video is slightly disingenuous when it discusses the range for airborne rescuers, indicating 300 square miles. As the area of a circle is pi*r^2 =300 sq mi, the r is only 9.77 miles. I think this was for morale of those bobbing about, thinking of rescue. "They can see us, remember what they said?!?!"
