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What does Unicom stand for?

A UNICOM (universal communications) station is an air-ground communication facility operated by a non-air traffic control private agency to provide advisory service at uncontrolled aerodromes and airports and to provide various non-flight services, such as requesting a taxi, even at towered airports.

en.wikipedia.org - UNICOM - Wikipedia
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For other uses, see Unicom

A UNICOM (universal communications) station is an air-ground communication facility operated by a non-air traffic control private agency to provide advisory service at uncontrolled aerodromes and airports and to provide various non-flight services, such as requesting a taxi, even at towered airports.[1] It is also known as an aeronautical advisory station.[2] The equivalent European/ICAO service is known as (aerodrome) flight information service, abbreviated as AFIS or FIS.[citation needed]

Description [ edit ]

UNICOM is employed at airports with a low volume of general aviation traffic and where no control tower is active.[3] UNICOM stations typically use a single communications frequency. Some airfields always offer UNICOM service while others revert to UNICOM procedures only during hours when the control tower is closed. Under this protocol, aircraft may call a non-government ground station to make announcements of their intentions. Pilots who join the frequency later can request field advisories, which may include "weather information, wind direction, the recommended runway" and any previously reported traffic.[4] In some cases, the ground station is not staffed, and attempts to communicate will, of course, receive no acknowledgement. During these times, pilots self-announce their position and/or intentions over the CTAF frequency, which is often the same as the UNICOM frequency.[5] When a part-time UNICOM station is located on the same airport as a part-time control tower, the same frequency will be used by both ground stations to avoid confusion. Many UNICOM stations are operated by a fixed-base operator (FBO), and it may be possible to request services such as fuel trucks, taxi service from the airport, outgoing phone calls, and others.[6]

Frequencies [ edit ]

The actual frequency used at any particular airport can be found on the relevant sectional, terminal area chart or in airport directories, such as the Canada Flight Supplement.[1]

United States [ edit ]

In the United States, radio frequencies made available by the Federal Communications Commission for use as UNICOM are:[7] Airports with an Air Traffic Control tower or FSS (Alaska only) on the airport.[7]

122.950 MHz

Airports without an Air Traffic Control tower or FSS on the airport.[7]

122.700 MHz

122.725 MHz

122.800 MHz

122.975 MHz

123.000 MHz

123.050 MHz

123.075 MHz

Canada [ edit ]

In Canada, the radio frequencies assigned for UNICOM are:[1]

122.700 MHz

122.725 MHz

122.750 MHz

122.775 MHz

122.800 MHz

122.825 MHz

122.950 MHz

123.000 MHz

123.300 MHz

123.350 MHz

123.500 MHz

See also [ edit ]

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Can you get an IFR clearance from FSS?

This is a radio transceiver connected to an FSS or TRACON via landline. The pilot can request the clearance directly from the specialist over the radio. Other airports may require the pilot to call the National Clearance Delivery Telephone Number (888-766-8267).

pilotworkshop.com - Getting IFR Clearance at a Non-Towered Airport

Press to play audio

John:

“The first step is to consult the Chart Supplements (formerly known as the Airport Facility Directory (A/FD) for the airport. If you’re using one of the tablet based applications such as Foreflight, the frequencies will be on the airport home page. Procedures will be different depending upon the equipment installed at each airport. The communications section of the Supplement will list the radio frequencies and phone numbers available at each airport. Many airports have a Remote Communications Outlet (RCO). This is a radio transceiver connected to an FSS or TRACON via landline. The pilot can request the clearance directly from the specialist over the radio. Other airports may require the pilot to call the National Clearance Delivery Telephone Number (888-766-8267). This number will connect you with an AFSS specialist who can relay the clearance from the TRACON or Center. Another good source is to call and check with the locals if you are not familiar with the airport. Call the FBO or local flight school and ask what method they use. Sometimes they know, for example, that even if there is no RCO, you can reach a nearby ATC Facility while still on the ground. And you can always ask the last controller you were talking to before going into the airport. They usually know whether they may be reached on the ground or may suggest an alternate method of getting the clearance.”

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