A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2014 Aug 25, 13:17 -0700
The attached USNO calculation has your observation at 28.2' toward from the given assumed position. The most likely error here is that you read the sextant 1° too high which is easy to due. If this LAN observation is worked out for the artifical horizon sextant reading of 118° 30' then your LAN Latitude will be close to the actual Latitude.
Hs 59° 12.4'
Dec 10° 57.2' N
90° - 48° 15.2' = Latitude 41° 44.8' (close to assumed Lat of 41° 43.5'N)
Give it another try when you have a chance.