Chapter A11 - Airborne Collision Avoidance Systems

Question 1

Immediate action: _____
Future action WILL be required: _____
Future action MAY be required: _____

Answer 1

• WARNING
• CAUTION
• ADVISORY

Question 2

Warning - action _____
Caution - action ______
Advisory - action _____

Answer 2

• is required
• will be required
• may be required

Question 3

TCAS
RA =
TA =
Proximate traffic =

Answer 3

RA = RED SQUARE (CLIMB / DESCEND)

TA = YELLOW DISC (TRAFFIC)

Proximate traffic = white or cyan solid lozenge

Question 4

TCAS
there are no instructions given at all :
- when the aircraft is below ____
- no descent RAs are given below ____
- no increase rate of descent commands below _____

Answer 4

• 400 ft AGL
• 1000 ft AGL
• 1450 FT

Question 5

Answer 5

Question 6

TCAS

Range - measuring the time lapse between the transmission of an interrogation signal and the reception of a reply signal.

Bearing - two specific antennas.

Height - Mode C pressure altitude

Question 7

TCAS stands for?

Answer 7

Traffic Collision Avoidance System

Question 8

ACAS, stands for?

Answer 8

Airborne Collision and Avoidance System,

Question 9

Mode A -
Mode C -
Mode S -

Answer 9

Mode A - Code
Mode C - Code + ALT
Mode S - Datalink

Question 10

TCAS operates using ___?

Answer 10

Secondary Surveillance Radar (SSR)

Question 11

The system interrogates nearby MODE S transponder-equipped aircraft on ____ and receives replies on ______

Answer 11

• 1030 MHz
• 1090 MHz.

Question 12

A TCAS does not communicate with other aircraft TCAS, the communication is with the targets’

Answer 12

transponders.

Question 13

The normal interrogation period is __ second.

In high density traffic areas, in order to prevent SSR saturation, that period can be extended to __ seconds and the transmission power reduced.

Answer 13

• 1
• 5

Question 14

reduced surveillance and can reduce the range detection down to ___ NM.

Answer 14

• 5

Question 15

CPA is ?

Answer 15

Closest Point of Approach

Question 16

Other Traffic: targets outside a _ NM radius OR a relative altitude separation of more than ___ ft

Answer 16

• 6
• 1200

Question 17

Proximate Traffic: targets with a relative altitude separation of less than ___ ft AND within ___ NM of your aircraft

Answer 17

• 1200
• 6

Question 18

TAU =

Answer 18

Time

Question 19

The tau, and corresponding size of the collision area, is determined by factors as ____

Answer 19

speed, altitude and heading.

Question 20

TAs can be:

• ____- “TRAFFIC, TRAFFIC, TRAFFIC”
• ____ - on the NAV display

Answer 20

• Aural
• Visual

Question 21

RAs can either be:

• ____ – monitor your current rate of climb/descent - do not make any changes to your flight path
• _____ – requires a pitch manoeuvre

Answer 21

• Preventative
• Corrective

Question 22

Depending on the equipment available on the aircraft and the intruder, the RAs can be:

• _____ – only one aircraft generates a RA
• ______ – both the aircraft and the target generate coordinated a manoeuvre (Note: no account is taken of stall speed)

Answer 22

• Uncoordinated
• Coordinated

Question 23

Answer 23

Question 24

Answer 24

Question 25

EASA - TA and RA generation is based on

Answer 25

TIME

Question 26

GPWS or Wind Shear Warnings - TCAS is

Answer 26

inhibited