Using handheld GPS on commercial flight
On a resent flight with Ryan Air I was asked to turn off my handheld GPS I asked why! but the cabin crew just said you couldn't use on the aircraft or near the airport. I do understand that 737 800s have more intricate avionics than the PA28 I use the unit in but I can't see that the gps could cause any problems to the aircraft! The cabin crew said laptops and handheld gaming systems could be used after take off so I just thought that GPS wasn't a problem!
Can anybody tell me the reason why I couldn't use the unit (Garmin 196) or is this just Cabin Crew not understanding what GPS is or even just a Ryan Air thing thanks in advance!