Height and RTH

[RichardThiery]

I'm new to the world of drone flying and recently purchased a Mavic Pro. I'm capturing some great video but would like to fly my drone off a cliff and capture some video.
So question is, my RTH is set to 50m, but if the cliff drop is 150m does the drone calculate the 50m from where it took off or (150+50m) or will it drop to 50m above sea level and smack into the side of the cliff?

 

[kndll]

RTH is based on launch point = 0 , flying below launch point , height will show negative numbers , drone will ascend to your set rth height above launch point before landing .

 

[Riptide]

You should watch this video:

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[PINEBARON]

You should watch this video:

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Thank You. I vaguely knew about this quirk but now I feel better/fully educated about this quirk and will bear it in mind since I frequently fly above water.