I live in an area that has minor streams that contain small amounts of gold! The pools with gravel shift around and are under the resolution of Google Earth to spot them. I use the Mavic Air to fly over the streams and locate the sweet spots. For interest I get down into the canyons where the gold is but the flying is super tricky, lots of fine branches, satellites drop to only 1 or 2 so Air goes into Opti, and then gets freaked out by the moving water underneath it. I try to stay in tripod mode for steady and careful picking my way through the branches but dropping into opti over water kept randomly kicking me out. And then the downward sensors wouldnt hold me and the wind would drift me sideways! nervous flying for sure! Batteries had to be in my pocket as it wouldnt fly otherwise (gave me cold battery alert and wouldnt launch). There is a lot of interesting flying here, using 1080p 120 FPS and 4K combined. Enjoy!