Non-towered airport

For example, a common traffic advisory frequency (CTAF) is recommended for radio communication and is used in the United States, Canada, New Zealand and Australia.

Temporary towers may operate out of an existing airport building, an RV, or even simply a chair (with a portable transmitter and binoculars).

However, it is also necessary to find the money to construct a building and pay the controllers' salaries; in some cases aviation regulations or local opposition may prevent establishment of the unit.

[8] Hazards are created by failure to use radios to report positions and intentions when operating within the airspace, which can lead to collisions between aircraft unaware of each other.

In 1996, an incoming United Express Flight 5925 collided with a King Air aircraft, which failed to report its intent to take off on a common traffic advisory frequency at non-towered Quincy Airport in Illinois.