A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2019 Aug 27, 11:51 -0700
These values do not look like the ones I make blunders with.
But still - you say that your friend's sights almost perfectly agree with the Antispoof's output - this still could mean that your friend reads the arc and drum correctly when he already knows the answer.
My second most frequent source of errors is reading the watch. Especially if the watch is not a digital one.
Were those values in agreement with the app, both in HS and time?