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What is the correct way to transmit the wind vector and speed "170 degrees, 18 knots, gusting 30 knots" in radiotelephony?

  • A

    Wind one seven zero degrees one eight knots gusting three zero knots.

  • B

    Wind one hundred and seventy degrees eighteen knots gusting thirty knots.

  • C

    Wind one hundred and seventy degrees one eight knots gusting three zero knots.

  • D
    Wind one seven zero degrees eighteen knots gusting maximum thirty knots.

Refer to figures.
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.

Note.— The following examples illustrate the application of this procedure (see 5.2.1.4.3.1 for pronunciation).

Wind direction and speedTransmitted as
200 degrees 70 knotsWind two zero zero degrees sever zero knots
160 degrees 18 knots gusting 30 knotsWind one six zero degrees one eight knots gusting three zero knots

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