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- Duration: 1:00
- Published: 25 Aug 2010
- Uploaded: 23 Sep 2010
- Author: TradeTheTrend
- http://wn.com/News_Update_China_Unicom_Confirms_It_Will_Sell_iPhone_4_On_September_16
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Universal Communications or as known by its abbreviation, UNICOM, is an air-ground communication facility operated by a private agency to provide advisory service at uncontrolled aerodromes and airports.
In this system or protocol, aircraft may call a non-government ground station to make announcements of their intentions. In some cases, the ground station is not staffed. If no one is staffing the ground station, pilots broadcast their location and intentions over the UNICOM channel. When the ground station is closed this is done without an acknowledgement.
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.
126.700 MHz
Category:Aviation terminology
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