NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2026 Jul 31, 01:16 -0700
Re: Geoff's post ( https://navlist.net/Where-World-San-Diego-Hitchcox-jul-2026-g58854 )
On Jul 28th, 2026 , Hoe 10ft / Standard T & P, i.e. 10°C & 1013.25 mb, and:
Sun Declination computed for each time and Sun Ephemeris better than +/- 0.5", and with heights published here-under corrected for only instrument error as follows:
UT1₁ = 01:17:01 / SUNL₁ = 69°22.3' and UT1₂ = 02:51:02 / SUNL₂ = 52°03.8'
For vessel at anchor (steady position) obtain 03:00 Fix at:
N01°25.4' / E172°58.5' (or: N01°25.37' / E172°58.51')
Expected actual accuracy better than 0.2' with biggest uncertainty here coming from Atmospheric corrections (Dip, P & T) as usual.
Actual T definitely warmer than 10°C and if reasonably taking T = 25°C and unchanged P at 1013.25 mb, obtain:
N01°25.4' / E172°58.5' (or: N01°25.36' / E172°58.46') with no significant change on Fix here whatsoever.
Kermit
PS: Geoff, did you get my e-mail sent just one hour ago from "here-above" ?
antoine.m.couette@club-internet.fr , or: +33-612 880 636 (if sms preferred)
