Introduction to phraseology[PDF]
What is phraseology?
If standard phrases are adhered to when composing a message, any possible ambiguity will be reduced to a minimum.
Source of this phraseology is extracted from ICAO documentation 4444 16th edition dated 10/Nov/2016
- An ATC shall start all messages with the call sign of the addressed aircraft.
- A pilot usually ends read-back messages with his call sign.
- A pilot usually starts a message with the ATC call sign followed by his own call sign when he calls the ATC unit for the first time.
Some abbreviations may be spoken using their constituent letters rather than the spelling alphabet, for example, ILS, QNH, RVR.
The following words may be omitted from transmissions provided that no confusion or ambiguity will result:
- “Surface” in relation to surface wind direction and speed
- “Degrees” in relation to radar headings
- “Visibility”, “Clouds” and “Height” in meteorological reports
- “Hecto Pascal” when giving pressure settings
The aircraft or vehicle causing the condition in the clearance issued shall be the first aircraft/vehicle to pass in front of the other aircraft concerned. In all cases a conditional clearance shall be given in the following order and consist of:
- the condition
- the clearance and
- brief reiteration of the condition
SAS947, behind DC9 on final runway 12, line up runway 12 and wait behind
The following transmitting techniques will assist in ensuring that transmitted speech is clear and satisfactorily received:
- before transmitting, listen out on the frequency to be used to ensure that there will be no interference with a transmission from another station
- use a normal conversational tone, and speak clearly and distinctly
- maintain the speaking volume at a constant level
- a slight pause before and after numbers will assist in making them easier to understand
- avoid using hesitation sounds such as "er"
- be familiar with the microphone operating techniques, particularly in relation to the maintenance of a constant distance from the microphone
- depress the transmit switch fully before speaking and do not release it until the message is completed
- ATC route clearances
- clearances and instructions to enter, land on, take off from, hold short of, cross and backtrack on any runway
- runway-in-use, altimeter settings, SSR codes, level instructions, heading and speed instructions
- transition level
Strict adherence to read-back procedures ensures not only that the clearance has been received correctly, but also that the clearance was transmitted as intended.
The stringency of the read-back requirement is directly related to the possible seriousness of a misunderstanding in the transmission and receipt of ATC clearances and instructions.
DEHBA, taxi holding point runway 01
Taxi holding point runway 01, DEHBA
DEHBA, squawk 4525
- ICAO Documentation 4444 - Air Traffic Management - 16th Edition 2016 - Chapter 12
- VID 150259 - Creation
DATE OF SUBMISSION
- 00:41, 14 May 2021
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