By definition an airport is a place where aircraft can land and take off. And, it so happens there are more than 5,000 public-use airports in the United States. Although most are categorized as non-towered, there are some 600 airports that have an operating air traffic control tower. Do you worry about communicating with the tower or do you have trepidations about self-announcing on the Unicom? Whether you’re new to these environments, or just need a review, this Safety Spotlight refreshes your knowledge and improves your airport etiquette.