AIM - RAC 4.5.5 - Aerodrome Traffic Frequency (ATF)

Aerodrome Traffic Frequency

An Aerodrome Traffic Frequency (ATF) is normally designated for active uncontrolled
aerodromes that do not meet the criteria listed in RAC 4.5.4 for an MF. The ATF is
established to ensure that all radio-equipped aircraft operating on the ground or within the
area are listening on a common frequency and following common reporting procedures.
The ATF will normally be the frequency of the UNICOM where one exists or 123.2 MHz
where a UNICOM does not exist. Trained vehicle operators who possess a valid radiotelephone
licence and authorized to do so, can communicate with pilots using two-way
communication on the ATF and provide information such as:

(a) position of vehicles on the manoeuvring area;

(b) position of other aircraft on the manoeuvring area; and

(c) runway condition, if known.

The specific frequency, distance and altitude within which use of the ATF is required
will be published in the CFS.

Example:     ATF – tfc 123.2 5 NM 5500 ASL

Personnel providing Approach UNICOM service, can also advise pilots on the ATF of
the runway condition and position of vehicles or aircraft on the manoeuvring area.

NOTE:         Pilots may be able to communicate with either the UNICOM or the vehicle
                     operator if radio-equipped, and co-ordinate their arrival or departure while
                     using normal vigilance to ensure safe operations. When communications
                     cannot be established (no reply or NORDO) or the status of the runway is
                     unknown, it is the pilot’s responsibility to visually ascertain the runway
                     condition before landing or taking off.

The designation of an ATF is not limited to aerodromes only. An ATF may also be
designated for use in certain areas other than the area immediately surrounding an
aerodrome, where VFR traffic activity is high, and there is a safety benefit to ensuring
that all traffic monitor the same frequency. For example, an ATF area could be
established along a frequently flown corridor between two uncontrolled aerodromes.
All aircraft operating within the area, below a certain altitude, would be requested to
monitor and report intentions on one frequency. When such an area is designated, it
will be specified either in an Aviation Notice, or in the CFS.