CONTROLLER-PILOT DATA LINK COMMUNICATION

Date: 2015-10-07; view: 700.

XVIII. Read the text and complete the sentences below.

CPDLC is communication system which allows pilot and controller to communicate with the help of data link. CPDLC allows controllers to issue common clearance directions, such as flight level assignments and constraints, frequencies, route changes and deviations, speed restrictions, and requests for information. The flight crew can then respond.

The CPDLC application provides air-ground data communication for the ATC service. This includes a set of clearance/information/request message elements which correspond to voice phraseology employed by Air Traffic Control procedures. The controller is provided with the capability to issue

· level assignments

· crossing constraints

· lateral deviations

· route changes and clearances

· speed assignments, radio frequency assignments

· various requests for information.

The pilot is provided with the capability to respond to messages, to request clearances and information, to report information, and to declare an emergency. The pilot is, in addition, provided with the capability to request conditional clearances (downstream).A “free text” capability is also provided to exchange information not conforming to defined formats.

The benefits of flight deck integrated ATC systems include the following:

√Enhanced flight crew situational awareness.

√Shift of workload from controller to pilot. For example, controllers can issue sequence positions and pilots can be left to maintain their sequencing without further controller direction.

√Alleviates miscommunication problems.

√Improved efficiency and system capacity by allowing a reduction of necessity to repeat missed messages or correct errors in read-backs.

√Data-link communication can act as a back-up to traditional radio communication.

√Digital communications are (generally) more reliable than analogue communications.

But these radio communications are inherently vulnerable to error.

§ Resources for radio communications (particularly frequencies) are limited.

§ When there is congestion of air traffic it requires from controller high workload

§ Congestion on ATC frequencies results in communication errors, particularly due to blocked transmissions (which themselves only generate further congestion).

Complete the statements.

1. CPDLS is……………………………………………………..

2. It's principle of work is…….....................................................

3. Its benefits are………………………………………………..

4. Its drawbacks are……………………………………………...

5. I consider that this system can/ can/t be used as………………