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WHAT IS ACAS. ACAS (Airborne Collision Avoidance System) is also known as TCAS (Traffic Alert and Collision Avoidance System).It is a transponder based interrogation system capable of displaying conflicting traffic and providing resolution advice.Provides an extra level of protection against mid-a
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1. AIRBORNE COLLISION AVOIDANCE SYSTEM ACAS
2. WHAT IS ACAS ACAS (Airborne Collision Avoidance System) is also known as TCAS (Traffic Alert and Collision Avoidance System).
It is a transponder based interrogation system capable of displaying conflicting traffic and providing resolution advice.
Provides an extra level of protection against mid-air collision.
ACAS is mandatory for all aircraft over 10 seats operating in US airspace.
Transport Canada requires large aircraft to be equipped with ACAS.
3. HOW IT WORKS ACAS consists of aircraft mounted antennas, computer processor, flight deck display and controls, and Mode S transponder.
Altimeter and radar altimeter inputs are used to determine relative altitude and inhibit RAs close to the ground.
ACAS is capable of displaying targets for other transponder equipped aircraft.
The ACAS set transmits an interrogation signal which other aircraft transponders reply to.
The ACAS computer determines rate of distance change. TAs and RAs are based on this closure rate.