AIRBORNE COLLISION AND AVOIDANCE SYSTEM (ACAS)

Question 1

1. On receipt of a TCAS RA your action is to:

Answer 1

a. initiate the required manoeuvre immediately.

Question 2

2. Which of the following statements concerning TCAS is correct:
   a. TCAS 2 provides avoidance instructions in the vertical and horizontal planes.
   b. TCAS 2 cannot provide information on non-SSR equipped intruders.
   c. TCAS 2 requires Mode S to be fitted to other aircraft.
   d. TCAS 2 provides advice on which way to turn.

Answer 2

b. TCAS 2 cannot provide information on non-SSR equipped intruders.

Question 3

3. With reference to Traffic Collision Avoidance Systems. The difference between TCAS I and II is that:
   a. TCAS II can provide Traffic Advisories and Resolution Advisories whilst TCAS I can only provide Traffic Advisories .
   b. TCAS II can only be fitted to large aircraft which carry more than 30 passengers. Whilst TCAS I can be fitted to any aircraft.
   c. TCAS I can be fitted to aircraft which carry transponders with Mode A only whilst TCAS II can only be fitted to aircraft whose transponders include either Mode C or Mode S.
   d. TCAS II can only be fitted to aircraft which are equipped with EFIS.

Answer 3

a. TCAS II can provide Traffic Advisories and Resolution Advisories whilst TCAS I can only provide Traffic Advisories .

Question 4

4. The aural messages provided by TCAS II are:

Answer 4

c. Climb; Descend; Increase climb; Increase Descent.

Question 5

5. With reference to Traffic Collision Avoidance Systems:
   a. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary and has the clearance confirmed by ATC.
   b. RAs may be disregarded only when the pilot visually identifies the potentially conflicting traffic and decides that no deviation is necessary and has advised ATC of the other aircraft’s proximity.
   c. RAs must never be disregarded.
   d. RAs may be disregarded only when the pilot visually identifies the potentially
   conflicting traffic and decides that no deviation is necessary.

Answer 5

d. RAs may be disregarded only when the pilot visually identifies the potentially
conflicting traffic and decides that no deviation is necessary.