NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude by lunar altitudes
From: Antoine Couëtte
Date: 2025 Jun 23, 01:50 -0700
From: Antoine Couëtte
Date: 2025 Jun 23, 01:50 -0700
Dr George Bennett's method - or maybe should I name it "Sir Francis Chichester's Method" - is clever indeed while probably not so accurate as true Lunars, as suspected then by the UK Nautical Almanac Director.
I can vaguely recall that it has been addressed on NavList earlier (many many moons ago) but it had totally escaped my mind.
I am going to carefully rework Dr George Bennett's own example and check whether I can reproduce his published own results, and will keep you posted :-) then.
Thanks again in the mean-time,
Kermit
PS: I am not "running" at all to be the only one to study your predicament, Bob, especially since other NavList Members can now use this article exactly as I am intending to do.






