Sea Crash for no apparent reason. Please help me to understand what happened

[Nico X]

Hello Everybody,
I safely piloted my spark from an harbour to the open sea following a boat, which was carrying me and the subject of my video story. Then my drone landed on the deck (it wasn't and easy one given to the wind).
After a short navigation (we were close to the shore) I launched it again but it lost suddenly video connection (it was like 3 meters away from the remote!) and then quickly became unresponsive, hovering on the see at about 50cm altitude.
It was impossible to take it home, so we had to recover it manoeuvring with the boat. Unfortunately the wind and the high sea didn't help us so it went under the sea. Notwithstanding the freezing temperature, I had to jump from the boat and to recover it from the sea bed.
I don't want even to bother about taking it to DJI service (in Rome, Italy, it suks anyways). I want to know why it happened. why it had such behaviour. why it got unresponsive on the sea. I want to avoid the same mistake in the future with my next drone...
Thanks in advance for your help
Nico

 

[SoccerRef12]

Upload your flight log to here: DJI Flight Log Viewer | Phantom Help
It will give you a ton of info. If you need more help, post the link if the flight log back here and many forum members who are smarter than me can help you. Good luck!

 

[Nico X]

I did that. I am afraid the latest log available is about the first successful flight not the one which ended in a crash...

DJI Flight Log Viewer | Phantom Help

Upload and view DJI Phantom, Mavic, and Spark flight logs online

www.phantomhelp.com

 

[Tentoes]

You might also ask over at DJI FORUM

Some real brainiacs dwell there and love figuring stuff like this out.

 

[SoccerRef12]

Without the flight logs there's no way of telling what happened.

 

[rix]

Wind,Sea Salt ? The Spark is a Mini vacumn that cools the electronics. How often do you fly in these environments.You dont say how hard of a boat landing you had.(force wise)
Do you have any photos of the day in question ? From other cameras? Just to see conditions..
Sorry for you loss... Pop off the cover of the drone and take some pics to share with the group..
Rix

 

[Duux]

I had the same problem a month ago (fortunately it did not fall), when I tried to fly to the port (Tenerife Beach). It fly about 5 meters after which we lost the connection, returned, lost again. I think it was because of radar, radio interference.
I flew again, but in another location and there were no problems.