Specific phraseology[PDF]

Alerting phraseology

ATC instruction for low altitude warning:

(aircraft call sign) LOW ALTITUDE WARNING, CHECK YOUR ALTITUDE IMMEDIATELY, QNH IS (number) [(units)]. [THE MINIMUM FLIGHT ALTITUDE IS (altitude)]

ATC instruction for terrain alert:

(aircraft call sign) TERRAIN ALERT, (suggested pilot action, if possible).

8.33 kHz channel spacing

In this paragraph, the term “point” is used only in the context of naming the 8.33 kHz channel spacing concept and does not constitute any change to existing ICAO provisions or phraseology regarding the use of the term “decimal”.
Instruction to request confirmation of 8.33 kHz capability:
  • CONFIRM EIGHT POINT THREE THREE
Instruction to indicate 8.33 kHz capability:
  • AFFIRM EIGHT POINT THREE THREE
Instruction to indicate lack of 8.33 kHz capability:
  • NEGATIVE EIGHT POINT THREE THREE
Instruction to request status in respect of 8.33 kHz exemption:
  • CONFIRM EIGHT POINT THREE THREE EXEMPTED
Instruction to indicate 8.33 kHz exempted status:
  • AFFIRM EIGHT POINT THREE THREE EXEMPTED
Instruction to indicate 8.33 kHz non-exempted status:
  • NEGATIVE EIGHT POINT THREE THREE EXEMPTED
Instruction to indicate that a certain clearance is given because otherwise a non-equipped and/or non-exempted aircraft would enter airspace of mandatory carriage (of 8.33 kHz equipment):
  • DUE EIGHT POINT THREE THREE REQUIREMENT

Reduced vertical separation minimum (RVSM) operation

ATC instruction to ascertain RVSM approval status of an aircraft:
  • CONFIRM RVSM APPROVED
Pilot answer to report RVSM approved status or non-approved status followed by supplementary information:
  • AFFIRM RVSM
  • NEGATIVE RVSM [(supplementary information, e.g. State aircraft)]
ATC instruction to report RVSM non-approved status followed by supplementary instruction:
  • UNABLE ISSUE CLEARANCE INTO RVSM AIRSPACE, MAINTAIN [or DESCEND TO, or CLIMB TO] (level)
Pilot report when severe turbulence affects the capability of an aircraft to maintain height-keeping requirements for RVSM:
  • UNABLE RVSM DUE TURBULENCE
Pilot report that the equipment of an aircraft has degraded below minimum aviation system performance standards:
  • UNABLE RVSM DUE EQUIPMENT
ATC Instruction to request an aircraft to provide information as soon as RVSM-approved status has been regained or the pilot is ready to resume RVSM operations:
  • REPORT WHEN ABLE TO RESUME RVSM
ATC Instruction to request confirmation that an aircraft has regained RVSM-approved status or a pilot is ready to resume RVSM operations:
  • CONFIRM ABLE TO RESUME RVSM
Pilot instruction to report ability to resume RVSM operations after an equipment or weather-related contingency:
  • READY TO RESUME RVSM

Operational status of visual aids or navigation aids

Information of visual aids given by ATC:
  • (specify visual or non-visual aid) RUNWAY (number) (description of deficiency)
  • (type) LIGHTING (unserviceability)
  • TAXIWAY LIGHTING (description of deficiency)
  • (type of visual approach slope indicator) RUNWAY (number) (description of deficiency)
Information of navigation aids status given by ATC:
  • GBAS/SBAS/MLS/ILS CATEGORY (category) (serviceability state)
  • VOR/NDB (serviceability state)


GNSS service status

Pilot and ATC phraseology to establish a status of GNSS:
  • GNSS REPORTED UNRELIABLE (or GNSS MAY NOT BE AVAILABLE [DUE TO INTERFERENCE]) IN THE VICINITY OF (location) (radius) [BETWEEN (levels)]
  • GNSS REPORTED UNRELIABLE (or GNSS MAY NOT BE AVAILABLE [DUE TO INTERFERENCE]) IN THE AREA OF (description) (or IN (name) FIR) [BETWEEN (levels)]
  • BASIC GNSS (or SBAS, or GBAS) UNAVAILABLE FOR (specify operation) [FROM (time) TO (time) (or UNTIL FURTHER NOTICE)]
  • BASIC GNSS UNAVAILABLE [DUE TO (reason, e.g. LOSS OF RAIM or RAIM ALERT)]
  • GBAS (or SBAS) UNAVAILABLE
  • CONFIRM GNSS NAVIGATION
  • AFFIRM GNSS NAVIGATION

Capability of transponder equipment (SSR)

ATC instruction to ask aircraft transponder capability:
  • ADVISE TRANSPONDER CAPABILITY
Pilot answer to previous instruction from ATC:
  • TRANSPONDER (as shown in the flight plan)
  • NEGATIVE TRANSPONDER



Ground crew with flight crew phraseology

Pay attention that this phraseology is only related to ground personnel which assist pilots during the start phase of a flight. This phraseology should not be used by regular ground and tower ATC. This phraseology is given as an example. It can be used for specific management of some very specific events in IVAO.

Starting engine procedure

Ground personnel and pilot exchange about starting engine procedure:
  • [ARE YOU] READY TO START UP?
  • STARTING NUMBER (engine number(s)).

The ground crew should follow this exchange by either a reply on the intercom or a distinct visual signal to indicate that all is clear and that the start-up as indicated may proceed. Unambiguous identification of the parties concerned is essential in any communications between ground crew and pilots.

Pushback procedures

Ground personnel and pilot exchange during pushback procedure:
  • ARE YOU READY FOR PUSHBACK?
  • READY FOR PUSHBACK
  • CONFIRM BRAKES RELEASED
  • BRAKES RELEASED
  • COMMENCING PUSHBACK
  • PUSHBACK COMPLETED
  • STOP PUSHBACK
  • CONFIRM BRAKES SET
  • BRAKES SET
  • DISCONNECT
  • DISCONNECTING STAND BY FOR VISUAL AT YOUR LEFT (or RIGHT)

De-icing operation

Ground personnel (iceman) and pilot exchange prior to de-icing:
  • STANDING BY TO DE-ICE. CONFIRM BRAKES SET AND TREATMENT REQUIRED
  • [AFFIRM] BRAKES SET, REQUEST (type of de/anti-icing treatment and areas to be treated)
  • HOLD POSITION AND CONFIRM AIRCRAFT CONFIGURED
  • [AFFIRM] AIRCRAFT CONFIGURED, READY FOR DE-ICING
  • DE-ICING STARTS NOW


Ground personnel (iceman) and pilot exchange upon concluding de-icing procedure:
  • DE-ICING ON (areas treated) COMPLETE. ADVISE WHEN READY FOR INFORMATION
  • TYPE OF FLUID (Type I or II or III or IV)
  • HOLDOVER TIME STARTED AT (time)
  • ANTI-ICING CODE (appropriate anti-icing code)
  • FINAL STEP STARTED AT (time)
  • POST DE-ICING CHECK COMPLETED
  • PERSONNEL AND EQUIPMENT CLEAR OF AIRCRAFT
Note: Anti-icing code example: A de-icing/anti-icing procedure in which the last step is the use of a mixture of 75% of a Type II fluid and 25% water, commencing at 13:35 local time, is recorded as follows: TYPE II/75 13:35 (followed by complete name of anti-icing fluid)

See also

Reference

  • ICAO Documentation 4444 - Air Traffic Management - 16th Edition 2016 - Chapter 12

Author

  • VID 150259 - Creation

DATE OF SUBMISSION

  • 00:44, 14 May 2021

COPYRIGHT

  • This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.

DISCLAIMER

  • The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.