Nick,
I did read the question - after all, it wasn't me who speared off at a tangent burbling away about flying VC10's using an NDB and a stopwatch....
I'm delighted to hear that you use GPS, but refering to the systems we use in aircraft as "Garmin Wonderbox navigation systems" gives the impression of sneering, rather like the Judge in the "not the nine o'clock news" sketch when confronted with a digital watch...