Go-arounds occur with an average rate of 1–3 per 1000 approaches.[1] There is a large variation of go-around rates among different aircraft operators and operational environments. A go-around is not an emergency, and may be necessary for a number of reasons. Some of those include; unstable approach, unable to land in the touchdown zone, not in correct configuration, directed by ATC, obstacle on the runway (aircraft, vehicle, animal), or aircraft controllability issues.