Training courses for pilots for flights with the system ACAS (Airborne collision avoidance system)

The problem of aircraft collisions in the air became noticeable as early as the 50s. When the flight accidents began to happen with a massive loss of life, the ICAO (International Civil Aviation Organization) came to grips with this issue. A concept was developed, and then international standards of the On-Board Collision Avoidance System (Airborne collision avoidance system (ACAS)).

Of all the developments, according to this concept, the TSAS system (Traffic alert and Collision Avoidance System) was the main distribution. This system (in its latest versions and modifications) surveys the airspace around the aircraft, detects other aircraft, analyzes the information received, issues it to the crew, and in case of a collision danger, warns pilots about it and issues necessary recommendations for immediate action.

The surveillance function allows an aircraft equipped with a TCAS system to query the mode S and mode A / C transponders installed on the surrounding aircraft to determine the relative position and maneuvers of aircraft “threats”.

In the absence of the defendant from the requested aircraft, the TCAS does not see such an aircraft (helicopter), and if the requested aircraft does not transmit its height, TCAS II will issue only an informational message (Traffic Advisory (TA)) to help pilots establish visual contact. TCAS can simultaneously track up to 30 aircraft with a nominal range of 14 nautical miles for targets with transponders with A / C mode and 30 nautical miles for targets with transponders with mode S.

TCAS surveillance of aircraft with mode S transponders is based on the ability of these transponders to provide selective addressing.

TCAS uses the response to determine the range, azimuth, and altitude of the “threat” aircraft. These data are entered into the collision avoidance logic to determine if a “TA” or “RA” signal is required.

For training questions, please contact us by email: or by phone +38 044 337 17 75.