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It is most important that the intent of each aviation radiotelephony transmission is clearly stated — and readily understood and remembered by recipients. Putting the necessary words together before transmitting, keeping it brief, using the standard terminology and phrasing — aviation English — and always using your complete and correct call sign are the keys to communicating useful operational information.
Most of the material in this page is extracted from the Aeronautical Information Publication Australia book [AIP], published by the Aeronautical Information Service of Airservices Australia. The relevant section in the AIP is noted in the text headings. The full and up-to-date text is available online at the Airservices Australia website; to access AIP please first read this paragraph in the 'Flight planning and navigation' guide.
2.1 Radiotelephony pronunciation (AIP GEN 3.4 section 4)A phonetic alphabet is used in radiotelephony [R/T] communications when transmission of individual letters is required. This phonetic alphabet was originally developed by the North Atlantic Treaty Organisation as an international alphabet for use by the armed forces of the NATO nations.
NumbersThe R/T pronunciation of numbers should be the following phonetic form:
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2.2 Expressing time (AIP GEN 3.4)The 24-hour clock system is used in R/T transmissions. The hour is indicated by the first two figures and the minutes by the last two figures, e.g.:
Current time in use at a station is stated to the nearest minute in order that pilots may use this information for time checks.
Australian civil aviation uses Coordinated Universal Time [UTC] for all operations. The suffix 'Zulu' is appended when procedures require a reference to UTC, e.g.:
2.3 Standard words and phrases (AIP GEN 3.4)The following words and phrases are to be used in radiotelephony communications, as appropriate, and have the meaning given:
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Groundschool – VHF Radiocommunications Guide
| Guide content | Abbreviations and acronyms |
| 1. Transmitter licensing | [2. R/T phrasing] | 3. VHF characteristics and radio operation |
| 4. Microair 760 transceiver | 5. R/T procedures | 6. Safety and emergency procedures |
| 7. Aviation Distress Beacons | 8. Understanding SAR services |
|The next section of the VHF radiocommunications guide outlines VHF transmission characteristics and the operation of equipment.|