So you are right, WR, there is no data on correlation between nav methods and busts, but that's none has been collected.
It also shows IO540, that your usual statement that most CAS busts are most likely low houred non GPS pilots is based on .... errr? Guesswork? Feeling in your water?
I've nothing against GPS; in fact I've just started using a PDA/GPS as it's a lot easier in my cramped open cockpit. It seems very good I must say, although I did overlay a route pointing to Lasham instead of Popham on my first try (don't ask why
, but it was on a route I know well so soon realised my mistake). However, in the past I've always just drawn a line on the chart and nav'd as I've gone. I've never busted and know several pilots who fly the same way and haven't either. The accusation that traditional navigators are more likely to bust than GPS users is IMHO rather offensive. None of us are infallible, but those who get lazy are more likely to bust than those who keep on top of the game. GPS use is potentially brilliant for accurate navigation, but in the hands of a lazy pilot it really is a licence to cock up!
SS