Numbers shall be transmitted using the following pronunciation:
Information
Syllables to be stressed are underlined.
| Numbers | Code | Pronunciation | Audio |
|---|---|---|---|
| 0 | Zero | ZI RHO | |
| 1 | One | WUN | |
| 2 | Two | TOU | |
| 3 | Three | TREE | |
| 4 | Four | FOW EH | |
| 5 | Five | FIFE | |
| 6 | Six | SIX | |
| 7 | Seven | SEV EN | |
| 8 | Eight | AIT | |
| 9 | Nine | NIN EH | |
| 100 | Hundred | HUN DRED | |
| 1000 | Thousand | TOU SAND | |
| , (frequency) | Decimal | DAY SEE MAL | |
| . | Point | POINT |
All numbers, with few exceptions explained in ‘Tranmission of numbers (part 2)’, shall be transmitted by pronouncing each digit separately.
Examples:
| Heading | ||
|---|---|---|
| 100° | ONE ZERO ZERO DEGREES | |
| 260° | TWO SIX ZERO DEGREES | |
| 335° | THREE THREE FIVE DEGREES |
| Wind direction and speed | ||
|---|---|---|
| 150 degrees 10 kts | ONE FIVE ZERO DEGREES TEN KNOTS | |
| 80 degrees 15 kts | EIGHT ZERO DEGREES FIFTEEN KNOTS | |
| gusting 25 kts | GUSTING TWENTY FIVE KNOTS |
| Transponder code | ||
|---|---|---|
| 6230 | SQUAWK SIX TWO THREE ZERO | |
| 7600 | SQUAWK SEVEN SIX ZERO ZERO |
| Altimeter setting (QNH) | ||
|---|---|---|
| 1012 | QNH ONE ZERO ONE TWO | |
| 1025 | QNH ONE ZERO TWO FIVE |
| Runway | ||
|---|---|---|
| 06 | RUNWAY ZERO SIX | |
| 24L | RUNWAY TWO FOUR LEFT |
| Flight level | ||
|---|---|---|
| FL75 | FLIGHT LEVEL SEVEN FIVE | |
| FL200 | FLIGHT LEVEL TWO ZERO ZERO | |
| FL350 | FLIGHT LEVEL THREE FIVE ZERO |
Information
According to the ICAO DOC 9432 Radiotelephony Manual, FL 100, FL 200, etc are pronounced “FLIGHT LEVEL ONE-ZERO-ZERO”, and “FLIGHT LEVEL TWO-ZERO-ZERO”.
“FLIGHT LEVEL (number) HUNDRED” follows the French DGAC and the British CAA patterns.
