Use of GPS on Aeroplane
I have a Pilot III and it works perfectly OK in the Cherokee ... and sometimes even manages to successfully cross check my navigation by conventional means and confirm that I am where I think I am.
I took it to Tenerife with me at Christmas .. as I was flying a 172 whilst out there.
When I got on the BMI A-321 at Heathrow, I asked the head girl if she'd have a word with the skipper and ask if I could use the GPS during the trip. She didn't get back to me, but in the pre-take off announcement was "please do not use electronic equipment on board until after the seat belt signs are extinguished".
Duly I took it that as I hadn't bben told I couldn't use the contraption, then it must be OK. I turned it on at about 7-8,000 ft when the signs went out and it eventually locked on, albeit a little slower than usual, and decided where we were etc. It needed holding pretty close to the window to get coverage and kick start it occasionally but generally worked fine and said what I expected (and kept to about 470 kts and 35,000 feet). Nobody said a word about it, all trip, when I had it on my seatback table except when I was prompted to switch it off when the seat belt signs came on at about 8,000 in the descent.
I know there has been much debate about whether this contraption might interfere with Airbus electronics (I can vouch that a cellphone DOES interfere with the transponder in a Warrior) but I am on the side of "it's an aeronautical piece of kit and it shouldn't."