The aircraft it was fitted to was a DHC6 Twin Otter, which as you know has all the characteristics of a helicopter…. (gimmie a good head wind and I’ll show ya)
The only thing we could not do that the helicopters we supported could was hover.
We all used the same strips, fuel, food, beer lifes essentials.
A few of the crew flew both rotary and plank across the same terrain day in day out, and we all have the same response.
In a non-aid / remote area doing the stuff oil companies like. The cost of "E"gpws was wasted due to having to inhibit Betty most of the time because of the data base.
Having said all of that, If you are in a support aircraft at 250kts (say a Dash or King Air), going into a black hole area... it has already saved a few of my mates butts already.
The enhanced terrain awareness it gives (data base issues again) is great. If you dont know the area.
The local airworthiness authority got onto us and asked about our operational use and we told them strait. There only comment was that the local regional operator using 30 seaters was having the same porblems.
Now this was a few years back and i do not know if Honeywell have corrected the problems since then.
Once bitten twice shy on our part maybe
Fly safe
Hoggie