Instruções: As questões de números 45 a 49 referem-se ao texto abaixo.

Radio Discipline

Communication between pilots and air traffic controllers is a process that is vital for the safe and efficient control of air traffic. Pilots must report their situation, intentions and requests to the controller in a clear and unambiguous way; and the controller must respond by issuing instructions that are equally clear and unambiguous. ...[B]... data link communication has reached an advanced stage of development, verbal communication is likely to remain the prime means of air-ground communication for many years.

t is of course important that radio equipment should be reliable and easy to use, and should be capable of conveying the spoken word clearly and without distortion over long distances. However, the process of communication is equally important and must be successful even in the most difficult conditions.

Of the many factors involved in the process of communication, phraseology is perhaps the most important, because it enables us to communicate quickly and effectively despite differences in language and reduces the opportunity for misunderstanding. Standardised phraseology reduces the risk that a message will be misunderstood and aids the readback/ hear-back process so that any error is quickly detected.

Radio communications (including party-line communications) contribute to building the pilot’s and the controller’s situational awareness. Flight crew and controllers may prevent misunderstandings by providing each other with timely information, for better anticipation.

Good radio discipline is essential to this process. Poor radio discipline is the most common cause of breakdown in the RTF communication process.

Aspects of Radio Discipline

1. Always listen out before transmitting − unless flight crew listen out before making a first call on a new frequency, they may interrupt an exchange between other traffic and ATC.

2. Always use standard phraseology.

3. Follow best practice on message format and content.

4. Ensure the use of a high standard of English language and pronounce as clearly as possible whilst speaking at a sensible pace.

5. Do not communicate with aircraft in the national language when there is a risk of loss of situational awareness for nonlocal pilots.

6. Follow best-practice with regard to speed and timeliness of communication.

7. Always apply the read-back/hear-back procedure. 8. Always request a repeat of a transmission when in any doubt as to the content or meaning of it.

(Adapted from http://www.skybrary.aero/ bookshelf/books/113.pdf)