system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
What are separation minima in aviation?
gpt
Separation minima are the minimum distances allowed between aircraft that Air Traffic Control uses to improve safety in the National Airspace System. Usually, the Separation minimum is 1000 feet below flight level 290 and 2000 feet above flight level 290 vertically, and horizontally, 3 nautical miles.