A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Samuel L
Date: 2014 Aug 25, 04:53 -0700
I just got interested, again, in Celestial Navigation and bought a Celestaire Astra III-B
I did a noon site yesterday using a pan of water for an artificial horizon and need your help and advice in letting me know if I did it correctly. The result obained for Latitude got me within 4' 10" of our actual location.
In performing the Noon Site I "brought the Sun down" until it was completely superimposed on the Sun reflected from the artificial horizon.
Noon in my Longitude was 17:04:59 GMT
Here are the figures;
Hs using articial horizon- 119 deg 30' (I forgot to read the tenths on the vernier!)
I divided the Hs reading by 2 to get;
Hs- 59 deg 45'
Ho- 60 deg 39'
Declination -10 deg 57.3"
.....what follows is where I think I either made a mistake or didn't make a mistake....
Sun Semidiameter from the Almanac was 15'.8.....BUT....I wasn't getting the "latitude I wanted" so I divided the SD by 2 and used 7.9'
So....SD used= 7.9'
Final Ho was 41 deg 47' 42"
My actual Latitude was 41 deg 43' 32"
Any ideas on whether I performed the Noon site correctly?
Any other suggestions?