En-route phraseology[PDF]

Introduction

This article is a phraseology generic database. Please consult following articles for real application of this database:


Altitude Management to maintain separation

In addition to CLIMB and DESCENT instructions described in the general phraseology, we have:

ATC instructions to maintain the level of an aircraft before any change has been given:
  • MAINTAIN (level) [TO (significant point)]
  • MAINTAIN (level) UNTIL PASSING (significant point)
  • MAINTAIN (level) UNTIL (minutes) AFTER PASSING (significant point)
  • MAINTAIN (level) UNTIL (time)
  • MAINTAIN (level) UNTIL ADVISED BY (name of ATC unit)
  • MAINTAIN (level) UNTIL FURTHER ADVISED
  • MAINTAIN (level) WHILE IN CONTROLLED AIRSPACE
  • MAINTAIN BLOCK (level) TO (level).
Note: The term “MAINTAIN” shall not be used in lieu of “DESCEND” or “CLIMB” when instructing an aircraft to change level.

Separation instructions

ATC instructs to overfly a significant point at a certain time in order to maintain separation:
  • CROSS (significant point) AT (time) [OR LATER (or OR BEFORE)]
  • ADVISE IF ABLE TO CROSS (significant point) AT (time or level)
ATC instructs speed restriction during cruise in order to maintain separation between aircraft:
  • MAINTAIN MACH (number) [OR GREATER (or OR LESS)] [UNTIL (significant point)]
  • DO NOT EXCEED MACH (number)
ATC instructs a specific track to aircraft in order to maintain separation:
  • MAINTAIN TRACK BETWEEN (significant point) AND (significant point). REPORT ESTABLISHED ON THE TRACK
  • CONFIRM ESTABLISHED ON THE TRACK BETWEEN (significant point) AND (significant point) [WITH ZERO OFFSET]
Pilot answers:
  • ESTABLISHED ON THE TRACK BETWEEN (significant point) AND (significant point) [WITH ZERO OFFSET]
  • ESTABLISHED ON THE TRACK
Used when to apply a lateral VOR/GNSS separation confirmation of zero offset is required:
  • CONFIRM ZERO OFFSET
  • AFFIRM ZERO OFFSET

Track parallel to the cleared route

ATC instruction to pilot to perform a track parallel to the assigned route:
  • ADVISE IF ABLE TO PROCEED PARALLEL OFFSET
  • PROCEED OFFSET (distance) RIGHT/LEFT OF (route) (track) [CENTRE LINE] [AT (significant point or time)] [UNTIL (significant point or time)]
  • CANCEL OFFSET (instructions to rejoin cleared flight route or other information)


Vectoring instructions

Different ATC instructions for vectoring instruction:
  • FLY HEADING (three digits)
  • TURN LEFT (or RIGHT) HEADING (three digits) [reason]
  • TURN LEFT (or RIGHT) (number of degrees) DEGREES [reason]
Other ATC instructions available in vectoring procedure:
  • LEAVE (significant point) HEADING (three digits)
  • CONTINUE HEADING (three digits)
  • CONTINUE PRESENT HEADING
  • STOP TURN HEADING (three digits)
  • FLY HEADING (three digits), WHEN ABLE PROCEED DIRECT (name) (significant point)
  • HEADING IS GOOD
ATC instructions to notify aircraft that the vectoring procedure is terminated:
  • RESUME OWN NAVIGATION (position of aircraft) (specific instructions)
  • RESUME OWN NAVIGATION [DIRECT] (significant point) [MAGNETIC TRACK (three digits) DISTANCE (number) KILOMETRES (or MILES)]
When it is necessary to specify a reason for vectoring or for the above manoeuvres, the following phraseology should be used:
  • DUE TRAFFIC
  • FOR SPACING
  • FOR DELAY
  • FOR DOWNWIND (or BASE, or FINAL)
ATC instruction to request avoiding action:
  • DO YOU WANT VECTORS?
Pilot Instruction or answer to ATC in order to get vectoring guidance:
  • REQUEST VECTORS


Holding clearance

ATC clearance to pilot to perform a published holding procedure over a facility or fix:
  • CLEARED (or PROCEED) TO (significant point, name of facility or fix) [MAINTAIN (or CLIMB or DESCEND TO) (level)] HOLD [(direction)] AS PUBLISHED EXPECT APPROACH CLEARANCE (or FURTHER CLEARANCE) AT (time)
Pilot inquires, when he requests holding instructions, if there are no published parameters to follow:
  • REQUEST HOLDING INSTRUCTIONS
ATC clearance for an IFR holding procedure when a detailed holding clearance is required:
  • CLEARED (or PROCEED) TO (significant point, name of facility or fix) [MAINTAIN (or CLIMB or DESCEND TO) (level)] HOLD [(direction)] [(specified) RADIAL, COURSE, INBOUND TRACK (three digits) DEGREES] [RIGHT (or LEFT) HAND PATTERN] [OUTBOUND TIME (number) MINUTES] EXPECT APPROACH CLEARANCE (or FURTHER CLEARANCE) AT (time) (additional instructions, if necessary)
  • CLEARED TO THE (three digits) RADIAL OF THE (name) VOR AT (distance) DME FIX [MAINTAIN (or CLIMB or DESCEND TO) (level)] HOLD [(direction)] [RIGHT (or LEFT) HAND PATTERN] [OUTBOUND TIME (number) MINUTES] EXPECT APPROACH CLEARANCE (or FURTHER CLEARANCE) AT (time) (additional instructions, if necessary)
  • CLEARED TO THE (three digits) RADIAL OF THE (name) VOR AT (distance) DME FIX [MAINTAIN (or CLIMB or DESCEND TO) (level)] HOLD BETWEEN (distance) AND (distance) DME [RIGHT (or LEFT) HAND PATTERN] EXPECT APPROACH CLEARANCE (or FURTHER CLEARANCE) AT (time) (additional instructions, if necessary)


See also

Reference

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

Author

  • VID 150259 - Creation

DATE OF SUBMISSION

  • 00:43, 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.