A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Date: 2014 Dec 5, 10:58 -0000
Way to go boys! Wish I could come! Unfortunately grounded, but hope to be well enough for calm water day sailing to Scilly Isles in the spring.
Re: Chichester flight and pre-computed Hps. I bow to your superior knowledge Gary, but I’m a bit confused. In his Astro-Nav war time training book part 4 page 32, he recounts the flight as an example of “running down a position line”. He then clearly states that Alts and Az were pre-computed for expected times and APs to give a mock LOP and the actual LOP drawn parallel to this, separated by the time difference. Hughes, page 54 also mentions that he used the Bygrave to pre-compute Alts and Az to obtain a datum position line through the AP.
Either way, I’ll try your method +/- the Alts/time graph or Moo/mob. And see what I get.
Good flying boys!
Sounds like a plan and a good excuse to put a few hours on your new plane.