in answer to Flighttest-Engineer........
firstly....my good buddy warns me...dont post to Pprune when S___t faced ! Well ya got me again. But as I said to him , ya gotta provide a bit of entertainment sometimes.
Re the query from Flttest-engineer.....when I did the first big ferry there was no such thing as GPS. We had VLF-OMEGA but it was useless so we used conventional ADF VOR DME + finger on an ONC chart. VLF Omega BTW was a system primarily for submarines !
Second big ferry we did have LORAN C but it only had limited coverage...big gaps as I remember , anywhere where the Yanks had no interest.
What an adventure.....and it still is