DroneFlying
![](https://forum44.djicdn.com/data/attachment/common/aa/common_14_usergroup_icon.png) Second Officer
Flight distance : 10774613 ft
United States
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fans6d1b505c Posted at 2017-6-7 06:18
I am typing on my iphone now, seems like this is working...
So the log is above, drone crashed in second 0:23, i had 13 to 15 satellites until then. Can you see my inputs on the controls also? You can see that i have not even touched the controls when the drone already started moving
Thank you for posting the log. I apologize if my comment about people not posting logs came across as harsh, but we have had an unusually large number of cases of that lately and I suppose I'm just getting overly suspicious.
First off, as you said, the opinion that counts the most is DJI's, and I'm happy for you that they replaced your Mavic. If they say that it was a warranty problem then I'm not inclined to disagree them on this; I'd rather give you the benefit of the doubt.
Regarding the 50% battery issue, my personal opinion is that it all depends on what your flight plans are: if you plan to set a new distance record then 50% is a bad idea, but if you're just going to fly around for a few minutes within a short distance -- as you did here -- then it doesn't seem any more problematic than continuing an existing flight when the battery level drops to half.
With respect to your ATTI mode / GPS Position NoMatch errors, I did notice that the satellite count had dropped to a low value each time it occurred when. For example, the first time it occurs was when your satellite count went from 12 to 8 in an a very short period of time. By any chance were you flying under the eaves of a building / onto a balcony when this occurred? Google Maps shows those coordinates as being directly over what seems to be a part of the Hotel Du Lac that's four stories high, but your altitude was only about 9 meters above your takeoff point, which was located on a small dock at or near ground level.
In other words, assuming that Google Maps is reasonably accurate here, it appears you were flying into part of the hotel or at least close to doing so when ATTI was triggered. Given that and the surrounding mountains, it's not surprising that the satellite count would be low, which in turn I could see might very well trigger ATTI mode. To avoid this in the future you should be sure that a large portion of the sky is always "visible" to your Mavic so that its GPS receiver is able to maintain contact with a healthy number of satellites.
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