Transmission of numbers – Part 1

Numbers shall be transmitted using the following pronunciation:

– Syllables to be stressed are underlined.

Numbers

Code

Pronunciation

Audio

All numbers, with few exceptions explained in ‘Tranmission of numbers (part 2)’, shall be transmitted by pronouncing each digit separately.

Examples:

Heading

Wind direction and speed

80 degrees 15 kts

EIGHT ZERO DEGREES FIFTEEN KNOTS

Transponder code

Altimeter setting (QNH)

Runway

Flight level

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.