Avionics
Bizcraft Operators Advised To Wait on iOS 11 Upgrade
Devices on iOS 11 using Bluetooth/plug-in GPS receivers for position data can experience loss of GPS signal when carried on aircraft exceeding 300 knots.

Operators of business jets and turboprops who are using an Apple iPad as an electronic flight bag in conjunction with a Bluetooth or plug-in GPS receivers for position data should not upgrade to iOS 11, according to ForeFlight and GPS accessory device maker Bad Elf.