I was lucky to get it back, virtually unscathed apart from the propellers that needed to be replaced. Low battery triggered auto land (a little sooner than I was expecting) it crashed into some tree and took a tumble from about 80ft. The Mavic Air is very robust. Gimble, camera all sensors still working as normal. I'm extremely grateful to the guy that recovered my drone and left it in a safe place for me to find about 5 mins later. I was approx 1km away from the crash. I tracked the drone location through DJI Go 4 app. To say I was relieved to see my drone intact and waiting for me is an understatement. Unforrtunately no sign of the guy that recovered my drone.
The 3 rookie mistakes I made...that I can think of, there's probably a lot more lol.
1) I set out to fly long distance on 85% battery charge.
2) I flew long distance in Sport mode...to get to my area of interest. A group of sail boats just over 3km away from my location.
3) I didn't take into consideration wind direction. I have a strong suspicion that the drone was encumbered by wind direction and speed for the return to home flight.
I'd like to think that I will not repeat any of these oversights again. hmmm we'll see.