Ferris
I suggest you delete the "GA" from your post where you say
"If you are a GA pilot, wandering about without any idea of where you are without your GPS....."
This is inppropriate.
Part of the problem with Australian aviation is that GA is undervalued and expected to be second rate. We wrongly accept this attitude and so we have things like LHR happening.
Please do not perpetuate this attitude.