Had the phantom calculated the proper altitude it would have never hit that rock.
I said it earlier and my prediction is right about DJI not altering their offer of 20% off. Even if your drone didn't hit that rock, it would still head back to its original home point, which is in the middle of the river, and guess what? You may not even have a drone to be recovered and and no data log to be analysed now. So in the end, your drone is still doomed. May be you should thank the error in the barometer and your drone hit the rock, at least you have the drone in shallow water which you can recover, rather than at the bottom of the river.
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