On a flight this week the flight attendant stated that all electronic devices that transmit are banned from use throughout the flight INCLUDING GPS devices.
I understand their argument that some devices that transmit might jam the aircraft's radio signals even though this is unlikely.
I totally reject their claims that a GPS receiver has any chance of causing such interference.
The plane is banketed with the signals from the GPS satellites already. The GPS receiver does nothing to attract this electromagnetic energy toward the plane.