Mandatory frequency airport

Encyclopedia : M : MA : MAN : Mandatory frequency airport

An airport with a mandatory frequency (MF) or mandatory traffic advisory frequency (MTAF) does not have a control tower but still requires arriving and departing airport to communicate with other aircraft or a flight service station (FSS) on a published frequency.

Mandatory frequency airports do not exist in the United States, but they are common in other countries such as Canada, Australia, and Norway — often, an MF or MTAF airport is one with scheduled passenger service but insufficient traffic to support a control tower. If there is a flight service specialist monitoring the frequency, the specialist will give pilots advisories about traffic, weather, and surface conditions, and may relay IFR clearances from enroute controllers, but cannot give clearances him- or herself.

Some examples of MF airports in Canada include Kingston/Norman Rogers Airport and Gaspé Airport.

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