Tag
#explainer
2 posts · all posts →
-
MSL, AGL, WGS84: three altitudes you'll see at 35 000 feet
The number on the seat-back display, the GPS altitude in your phone, and your height above the ground are all different — sometimes by hundreds of meters. Here's how to read them.
-
Why GPS still works in airplane mode (and how Skyty uses that)
GPS receivers don't transmit anything — they only listen. Here's why your iPhone keeps tracking position the moment you flip airplane mode on, and how Skyty turns that into a flight tracker.