Air Navigation by Bubble Sextant

[neil_s]

Well done for real Air Nav! I note from your posts above that your averager may not be working. This device takes a sample of the sextant's altitude setting once every second over the averaging elapsed time and sums them - displaying the result in the little window. I have two Mk IX BM models that I use in the back garden and the averager makes a big difference to the accuracy of your sights. From a chair on solid ground, I can get LOPs that pass within 3-4 miles of the GPS fix. You might have a look also at the post immediately below yours discussing the results achieved by war-time navigators - maybe 30 miles is not too bad!

Neil_s