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All transmissions between aircraft should be prefixedwith the aircraft
callsign.When calling FLIGHTWATCH add the frequency inuse to the initial
transmission. This assists the operator inmonitoringmultiple frequencies.
COMMONTRAFFICADVISORY FREQUENCY (CTAF)
TheCTAF is the frequency onwhich pilots operating at a non-towered
aerodrome shouldmake positional radio broadcasts. If a discrete frequency
is not listed useMulticom126.7MHz. These frequencies arenot normally
monitored byATS.
To achieve thegreatest degree of safety, CAR166C requires pilots of aircraft
carrying a serviceable radiowhich they are qualified touse, tomake a
broadcastwhenever it is reasonably necessary to do so to avoid a collision,
or the risk of a collisionwith another aircraft at a non-towered aerodrome.
In certain circumstances carriage of radio and beingqualified to use it
aremandatory. Refer to the table on page 235 for report and broadcast
requirements.
Pilots of higher performance aircraft, or pilots operating at busy aerodromes,
are encouraged tomonitor/broadcast on theCTAFearlier to allow sufficient
time to gain situational awareness of the traffic.
The responsibility for collision avoidance, sequencing, and knowledgeof local
procedures lies solelywith the pilot in command.
Aircraft overflying a non-towered aerodrome should avoid the circuit area, and
the routes commonly flown by arriving and departing traffic.
Where a number of non-towered aerodromes are in closeproximity, a single
discreteCTAFmay be allocated to those aerodromes.Where a discreteCTAF
is prescribed, these frequencies are shown inERSA andERCLow charts.
Whereno specific frequency is prescribed thedefault CTAF is 126.7MHz.
When aUNICOM service is provided at a non-towered aerodrome and the
Unicom is theCTAF, ERSA identifies the frequency asCTAF/Unicom.
communications –ClassG
3 – commun i cat i ons