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How should the pressure setting of 1020 hPa QNH be read back?

  • A

    QNH wun zero too zero

  • B

    Altimeter wun zero too zero hectopascals

  • C

    Altimeter wun zero too zero

  • D

    QNH wun zero too zero hectopascals

The Pressure Setting of 1020 hPa QNH...

  • QNH = QNH spoken as constituent letters
  • 1 = Wun
  • 0 = Zero
  • 2 = Too
  • 0 = Zero

So, QNH wun zero too zero. Using individual numbers allows for clarity and better understanding over the radio, however a pressure of 1000 hPa can be spoken as a whole thousand.

ICAO Annex 10 Volume 2: 5.2.1.4.3.1

When the language used for communication is English, numbers shall be transmitted using the following pronunciation:

Numeral or numeral element Pronunciation

  • 0 = ZE-RO
  • 1 = WUN
  • 2 = TOO
  • 3 = TREE
  • 4 = FOW-er
  • 5 = FIFE
  • 6 = SIX
  • 7 = SEV-en
  • 8 = AIT
  • 9 = NIN-er
  • Decimal = DAY-SEE-MAL
  • Hundred = HUN-dred
  • Thousand = TOU-SAND

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