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An aircraft is flying north-east at 2500 feet. TOWER requests heading and level. What is the correct response?
  • A
    Heading 045 at 2500 feet.
  • B
    045 and 2500.
  • C
    Heading north-east at level 25.
  • D
    Heading 45 at 2500 feet.

Refer to figures.

  • Correct response: Heading 045 at 2500 feet.

ICAO Annex 10 — Aeronautical Telecommunications
Chapter 5
5.2.1.4 Transmission of numbers in radiotelephony
5.2.1.4.1 Transmission of numbers

5.2.1.4.1.1 All numbers, except as prescribed in 5.2.1.4.1.2 to 5.2.1.4.1.6, shall be transmitted by pronouncing each digit separately.

Headings Transmitted as
100 degrees Heading one zero zero
080 degrees Heading zero eight zero

5.2.1.4.1.5. All numbers used in the transmission of altitude, cloud height, visibility and runway visual range (RVR) information, which contain whole hundreds and whole thousands, shall be transmitted by pronouncing each digit in the number of hundreds or thousands followed by the word HUNDRED or THOUSAND as appropriate. Combinations of thousands and whole hundreds shall be transmitted by pronouncing each digit in the number of thousands followed by the word THOUSAND followed by the number of hundreds followed by the word HUNDRED.

Altitude Transmitted as
800 Eight hundred
3 400 Three thousand four hundred
12 000 One two thousand

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