The use of UNICOM allows all pilots to be informed of the presence of nearby aircraft movement and to know the intentions of each of them, whether on the ground or in flight, in order to prevent collision and airprox.
Interest and explanation of Unicom
In the real world, Air Traffic Services are very often present. We have:
- En-route air traffic controllers that control the FIR and UIR airspace 24h per day and are available every day of the year.
- Major airports are mostly permanently staffed with at least one Air Traffic Control position. Usually available 24h per day or otherwise between 6h to 24h or when there is traffic. Traffic is not permitted outside of the operating hours. However, it is possible to specifically request a controller at an airport and to file a flight plan to that specific airport.
- Smaller airports are open with an active air traffic control service during slots of commercial traffic (7h-12h 14h-21h) and on days when commercial traffic is present. Outside of these time slots, the service is limited to self-flight information for pilots on a published radio frequency.
- Very small VFR airfields sometimes have only flight information services that are open only during day time or on weekends. Outside of these time periods, pilots rely on air-to-air self-information procedures.
Characteristics of UNICOM
What you should know about Unicom:
- IVAO pilot software is equipped with a filter that removes communication channels which are too far from your flying area.
- Only aircraft located in your area will receive your text transmissions in IVAO pilot software
- Only aircraft transmissions in your area will be displayed on your IVAO pilot software
- the UNICOM frequency is unique, equals to 122.800MHz and is used throughout the world.
- English language should be used for all messages
UNICOM is used by pilots in command of an aircraft to:
- send information to other pilots to notify them of his intentions of flying or moving on the ground
- to receive any information from other pilots and to be informed of their intentions and their movements
- coordinate with other pilots for a landing or take-off procedure, for altitude separation, for negotiating on integration in the traffic pattern, or for a visual separation
In summary, the use of UNICOM allows all pilots to be informed of the presence of nearby aircraft movement and to know the intentions of each of them, whether on the ground or in flight. This is called Situational Awareness: know where you are, who is around you and what is happening.
To do this, you must submit your intentions on UNICOM in advance so that everyone can correctly anticipate the actions of others.
Text only and NO VOICE
English to be used are the basic words from standard phraseology. The use of codes and text shortcuts are permitted.
- Having several hundreds of pilots voices on the same frequency would not be feasible
- The voice servers cannot filter channels according to distance
- There are not enough voice servers to accommodate everyone on UNICOM (saturation)
- Those who do not speak English would be penalized.
- VID 150259 - Creation - Wiki integration
- VID 150259 - Update October 2019
DATE OF SUBMISSION
- 16:15, 13 December 2019
- This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.
- The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.