Do you want airplane mode though, don't you want GPS on? Otherwise it's fine seeing the route but you might not know you're on it...
Airplane mode turns off transmitters, not GPS receivers.
@hippy started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Do you want airplane mode though, don't you want GPS on? Otherwise it's fine seeing the route but you might not know you're on it...