04-26-2025, 06:34 PM
Hi Tom
Good luck on your flight! I was shamed into checking the ie with and without the 5 degree switch! I took 5 sun sights for each state, from a good solid chair in the back garden with care to get the best size bubble. I got ie for 'with' of 2.2' on arc and 'without', 4.5' on arc. This with my 1944 vintage Mk IX BM. The BM model is helpful for stars, because it has a small telescope that swings in front of the eyepiece. It also has a choice of averager running times, 1 or 2 minutes. although I find 2 minutes is too long to hold the sextant steady.
Cheers! Neil
Good luck on your flight! I was shamed into checking the ie with and without the 5 degree switch! I took 5 sun sights for each state, from a good solid chair in the back garden with care to get the best size bubble. I got ie for 'with' of 2.2' on arc and 'without', 4.5' on arc. This with my 1944 vintage Mk IX BM. The BM model is helpful for stars, because it has a small telescope that swings in front of the eyepiece. It also has a choice of averager running times, 1 or 2 minutes. although I find 2 minutes is too long to hold the sextant steady.
Cheers! Neil