TNF,
You could well be right but I fly on average 350hrs a year which equates to around 30hrs a month which is not a bad exposure?
Unless others like IO540 are flying at the exact same time as me then they have further exposure and don't seem to be experiancing problems either.
The only time I have ever seen an error in GPS on my boat was when we had a faulty antenna connector which had corroded in the sea air. The loss of satelite coverage due to the unit going "blind" gave position errors that were still within about 300m.
I have also never recieved a RAIM warning on my GNS430 which is certified for BRNAV. I have certainly suffered far greater errors on an NDB do to the usual problems of atmospherics etc.
I am more of the view that people find a reason to fault GPS rather than embracing it as a usefull tool.
I do consider the person who trundles off with a handheld GPS and no map a fool, whereas the person who uses all the tools availble to them is very smart.