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An aircraft not equipped with an RNAV system receives a clearance for the RNAV departure 'ODEMI SIX VICTOR'. What is the correct response to ATC?

  • A
    'Negative ODEMI SIX VICTOR due to RNAV type'.
  • B
    'Unable RNAV'.
  • C
    'Unable ODEMI SIX VICTOR due to RNAV type'.
  • D
    'Negative RNAV'.

ICAO EUR DOC 001
6.3 RNAV Phraseology

6.3.1 The RTF phraseology for use by State aircraft, not equipped with RNAV, should be understood in the context of the mandatory nature of the B-RNAV equipment. As such, State aircraft, not equipped for B-RNAV operations, but having a navigation accuracy meeting RNP5, do require special handling by ATC, and therefore all include the following phrase whenever initial contact on an ATC frequency is established:

(aircraft callsign) NEGATIVE-RNAV

6.3.2 The RTF, associated with a failure or degradation of an aircraft's (civil or military) B-RNAV system, detected before or after departure, is as follows:

(aircraft callsign) UNABLE RNAV DUE EQUIPMENT

Not equipped with RNAV → Negative RNAV
RNAV equipment failure → Unable RNAV (due equipment)

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