Good day all,

Yesterday I was trying to get my hex to take-off from a rocking boat. However, when it took off, the copter erratically rolled left. When I hooked it up to Mission Planner, noticed the HUD was moving to the left a few times when I armed it (Copter was still on ground). At one point, there was a Alt Disparity message.

After a while, I armed it again and observed the HUD was quite stable and took off.

I took off from rocking boats lots of times on my APM without any problem. Yet, i noticed this on the pixhawk and like to know what actually happened.


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  • did you ever launch from a boat again? did it mess with the calibration>? 

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Dec 3, 2020