Does anyone know what the height a helicopter is supposed to fly at? I thought 500' was the lowest they can fly, unless they are landing. I saw a few apaches flying low today over my house. Granted I live in class c airspace, my father lives north of me and reported the same helicopters flying past his house around 500'. So it got me thinking about drones and the possibility one day of having to avoid a helicopter. If you keep it under 400', shouldn't we be safe? Or can helicopters fly below 500'?