Ch.4 CNS/ATM

Question 1

How are FANS 1/A+ and ATN denoted on the ATC FPL?

UAE OM-C 4.2.1

Answer 1

Z/ D1 (FANS 1/A) G1 (ATN)

Question 2

A380

What is EK fleet CNS capability?

(Communication, Navigation Surveillance)

UAE OM-C 4.2

Answer 2

• All Fleet have FANS 1/A+ and PBCS compliant
• All RR 380 and some GP 380 have ATN B1

(GP are EOJ-EOM)

Question 3

What is the main difference between ATN B1 and ACARS bases systems?

UAE OM-C 4.1

Answer 3

ATN: ATN B1 (VHF only)
ACARS: FANS 1/A+ and ADS-C (HF, VHF, SATCOM)
ATN is faster and more reliable and is set to phase out FANS CPDLC but still no equivalent ot ADS-C

Question 4

• What does FANS 1/A+ split into?

UAE OM-C 4.2.1 Rev 175

Answer 4

• CPDLC
• ADS-C

Question 5

What is the difference between ADS-B and C?

UAE OM-C 4.3.1 4.3.2

Answer 5

• ADS-B uses mode S XPDR to broadcast position info to ATC (line of sight limitation approx 120nm)
• ADS-C uses FANS 1/A+ via satellite to transmit position info to ATC replacing position reports and creates radar environment in remote airspace.

ADS-C is set to replace CPDLC

B is for broadcast
C is for Contract

Question 6

When is ADS-C established with NCC?

UAE OM-C 4.3.2

Answer 6

Automatically when airborne indicated by connection to DXBEGEK

Question 7

When transiting betwen FANS 1/A+ or ATN B1 CPDLC airspace, is there any pilot action involved?

UAE OM-C 4.4

Answer 7

No, its fully automatic

Question 8

What does the message latency monitor insure and how should pilots treat it?

UAE OM-C 4.4

Answer 8

It prevents crew from acting upon CPDLC delayed messages. So if crew are notified of latency they shall establish voice comms.

LIDO 1.6.6.4

Question 9

How is delivery of departure clearance via datalink achieved?

UAE OM-C 4.5

Answer 9

• DCL (Datalink)
• PDC (USA-CAN-AUS)
• CPDLC-DCL (USA)

Question 10

Elaborate on the differences of PDC, CPDLC-DCL and DCL methods to obtain departure clearances?

UAE OM-C 4.5

Answer 10

• DCL establishes direct comm between controller and pilot (ATC-Pilot) and requires an acknowledgement
• PDC uses an airline system as a median (ATC-Airline-Pilot) and requires a readback
• CPDLC-DCL is similar to DCL but requires crew to log-in first to establish ATC-Pilot CPDLC connection

Read CCI, AOI and CRAR to know which is in use

Question 11

Which chapter deals with Data-link procedures in LIDO?

UAE OM-C 4.5

Answer 11

1.6.6

Question 12

How can a pilot know is D-ATIS, D-VOLMET is available?

UAE OM-C 4.6

Answer 12

it is denoted in the AGC chart