Ok so I am proposing to the use of UAV's to my Fire Department. I need help with math... When the P3 (for demo purposes, not the intended UAV for fire ops) is up 400 ft, what is the approx viewable area on a clear delay in optimal conditions on a stock machine? I know it may be hard to answer but I need to go in with some numbers along with photos and video... Thanks ahead of time, I love u guys