Backon
If you have any specific queries feel free to email me. It is hard to teach the whole thing remotely by internet! I am a ground instructor, formerly of General Nav for the now dormant SFT. Alternatively if you're near Bournemouth anytime soon I am happy to teach you the rapid and accurate use of this wonderful and powerful calculating device, in exchange for a couple of pints.
And Tacpot, if you're well-taught then you should have a rough answer in your head already!
