A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Oct 21, 13:05 -0700
Perhaps there was a different defenition for length of day when the Raft Book was written. Anyway it would be a very crude way to determine latitude. I would rather take a guess at Polaris altitude. See link to the NOAA calculator for length of day which might be of use as a checker for anyone attempting timing trials.
From: Tony Oz
Date: 2017 Oct 21, 11:04 -0700