Re: The Observer’s Book on Astro-N avigation
From: Francis Upchurch
Date: 2016 Apr 2, 08:11 -0700
I think the flying boat sextant was just a very small, very accurate version of a normal sextant.
http://www.bonds-nautical-antiques.co.uk/items-for-sale/flying-boat-sextant.html
Francis