8 / 20
Your aircraft and an intruder are both TCAS II equipped. The information relating to this intruder available on your TCAS equipment is:
  • A
    two dimensional only, avoidance manoeuvres between both aircraft can not be coordinated
  • B
    three dimensional, your TCAS can generate both TAs (Traffic Advisories) and RAs (Resolution Advisories).
  • C
    three dimensional, avoidance manoeuvres between both aircraft can not be coordinated
  • D
    two dimensional only, your TCAS can generate both TAs (Traffic Advisories) and RAs (Resolution Advisories)
The question is simply asking what kind of information about the intruder’s position your won aircraft will receive after interrogation. The information carried from the intruder is going to be three-dimensional because of the following:
  • Bearing of the surrounding aircraft.
  • Variations of range and altitude.
  • Relative altitude.
  • Range between the aircraft.

As both aircraft are equipped with operational TCAS II, TCAS will operate normally and issue the appropriate interrogations and perform all tracking functions. TCAS will issue traffic advisories (TA) and resolution advisories (RA), when appropriate.
The TCAS works on autonomously and independently on the interrogation-reply principle. In fact, the system periodically sends interrogation signals to surrounding aircraft transponders. After receiving the interrogation, the intruder’s transponder will reply to the own aircraft TCAS with personal data. This interrogation principle allows the TCAS to determine the range between the aircraft by measuring the elapsed time between the interrogation and the reply. Based on this, the TCAS will internally calculate the collision threat and will issue the appropriate escape maneuvers.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.