NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Upper and lower scale quintants
From: David Pike
Date: 2024 Nov 5, 10:10 -0800
From: David Pike
Date: 2024 Nov 5, 10:10 -0800
Alexandre Eremenko you wrote: "It is equipped with the extra mirror which I suppose is for taking backsites. I suppose the back sites are read on the second scale."
Alexandre
I hadn't spotted that extra mirror. Has anyone any idea of the light paths and why anyone might be interested in measuring 180°? The only things I can think of is if you were tuning onto a line between two points or marker ships, perhaps a Fleet Review.
https://en.wikipedia.org/wiki/Fleet_review#/media/File:A_general_view_of_Line_B_with_the_battleships_at_anchor_during_the_Naval_Review_or_Kings_Review_of_the_Fleet_at_Spithead_(4793355124).jpg .
