In fact a friend of mine killed himself, his co-pilot, his god children and their mother by flying into a mountain on an IAP. Had they had GPS it is 99.9% certain they would be here today.
Two points regarding such statements.
1. They were not on the IAP if they hit a mountain. Perhaps one should ask why they were not on the IAP. Or if they were, why did the IAP fly them into the mountain.
2. Unless the mountain is marked on the GPS and flagged then there is little to be gained.
If extra or new equipment could have been used to solve the problems that this incident highlighted I would expect that it would have been highlighted by the investigators or even the people who made the video.
Never assume that adding more information into the situation will be the answer. It can be simply another distraction or the final bit of information that leads to overload.
Moving map displays for Large commercial aircraft are basic in terms of the information they provide and very well filtered to remove all unnecessary information. They are also very expensive.....never mind Garmin430 that would be peanuts in cost terms.
The larger type manufacturers are moving to the areas of terrain awareness and warning systems as well as HUDs and synthetic vision to improve safety.
Regards,
DFC
PS: Here is something to do - Put your handheld GPS in simulator mode and start flying round an airport a long way from base that you never visited. Eastern Europe or anywhere that you have absolutely no idea of the terrain or airspace. Then ask yourself if it improves your situational awareness or if in fact it takes so much playing with that you have no spare time to do anything else!