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TCAS

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TCAS Awareness kit

Clear of Conflict. Raising Awareness of the Airborne Collision Avoidance System (ACAS) User Interface is an aid to, and not a substitute for proper TCAS training. This aid was developed by National Air Traffic Services (NATS) in association with FlightSafety International and EUROCONTROL. More information about TCAS can be found here.

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ALLCLEAR? Toolkit
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Level Bust Toolkit
Clear of Conflict Go to:
Safety Behaviours - Guide for Pilots
TCAS II must be operated in RA mode to provide full safety benefits
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[1.25 mins]
"TCAS II Activation"
For maximum safety benefits, Pilots should follow RAs promptly and accurately
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[1.33 mins]
"Follow the RA"


Pilots must never manoeuvre in the opposite sense to an RA
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[1.26 mins]
"Mid Air Collision of B757 and Tu-154, Uberlingen Germany, 2002"


Pilots must communicate RA's to controllers as soon as possible
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[0.56 mins]
"RTF Phraseology associated with TCAS RAs"


Controllers must not interfere with pilot's reactions to RAs
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[1.26 mins]
"Controllers Avoiding Instructions Opposite to RA"
"Guidance for Controllers"
Vertical speed must be reduced in response to the 'adjust vertical speed' RAs
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[2.30 mins]
"Wrong reaction to 'Adjust Vertical Speed' RAs"


TCAS II displays should not be used for Self-Separation
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[1.15 mins]
"Incorrect use of the TCAS traffic display"


Aircrew should consider reducing vertical speed when approaching their cleared flight level
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[3.00 mins]
"Rate of climb within last 1000 ft before cleared level "


In a TCAS environment aircraft must operate their Altitude Reporting Transponder
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[1.58 mins]
"Effect of Transponder Setting"