About Max height Naza Limit

[gianni_BT]

Does somebody know if the zero point of the Height limit settable in the Naza is the transmitter position or the ground level?
For the side limits, I am sure is the position of the transmitter , but I am not sure about the height.
It makes a lot of difference if you start from the top of a peak.
If it is the transmitter quote, everithing is OK.
But if it is the ground level , you set e.g. 300mt and you fly from a top of a peak of a mountain, if your ground below the peak is more than 300mt far away your bird risks to go down down and you can never take it back.

 

[houldsworth1]

It is Above Ground Level (AGL) - so basically zero is where you are.

 

[gianni_BT]

It is Above Ground Level (AGL) - so basically zero is where you are.

That was exactly what I was warried about:if I am on the top of a mountain at an horizontal distance of 10/20 mt from my position, the ground level can be 500/600 mt below me. If I have set the safety limit for my phantom e.g. at 350mt(maximum height for a safe radio connection in a flat area), I risk the quadcopter goes down 150/250 mt below my position and I am not able to get it back.
This is the reason because, up to now, I left the height default limit to 2000 mt and forgot about setting a safe limit on height.