CPDLC

Question 1

What’s CPDLC?

Answer 1

Controller Pilot Data Link Communications.
It is a direct line of text message communication between the pilots and the ATC.
ACARS is one form of CPDLC.

Question 2

When is data link equipment required?

Answer 2

When flying above FL285

Question 3

Can you use a data-link system below FL285?

Answer 3

Yes, if:
1. Operator is approved
2. Crew is trained
3. Aircraft must be equipped with the proper elements

Question 4

What are the main advantages of the CPDLC?

Answer 4

1. Not reliant on the quality of the aural radio transmission to deliver and understand the message.
2. Allows for decongestion of the radio frequencies.

Question 5

What should you do when your CPDLC fails?

Answer 5

Revert to voice communications.

Question 6

When should you send a logon request for CPDLC?

Answer 6

10 to 15 min prior to entering the airspace in which you intend to use CPDLC.

Question 7

How long can you take before replying to a CPDLC message?

Answer 7

100 seconds