CAP 413 Radiotelephony Manual
Chapter 2 Page 5
1.6 Standard Words and Phrases
The following words and phrases shall be used in radiotelephony communications as
appropriate and shall have the meaning given below:
Table 6
Number Transmitted as Pronounced as
0823 Two Three or Zero Eight Two
Three
TOO TREE (or ZERO AIT TOO
TREE)
1300 One Three Zero Zero WUN TREE ZERO ZERO
2057 Five Seven or Two Zero Five
Seven
FIFE SEVEN (or TOO ZERO
FIFE SEVEN)
Table 7
Word/Phrase Meaning
ACKNOWLEDGE Let me know that you have received and understood this
message.
AFFIRM Ye s .
APPROVED** Permission for proposed action granted.
BREAK Indicates the separation between messages.
BREAK BREAK Indicates the separation between messages transmitted to
different aircraft in a busy environment.
NOTE: The phraseology “BREAK BREAK” may be confused with an instruction to an
aircraft formation and should be used with caution.
CANCEL Annul the previously transmitted clearance.
CHANGING TO I intend to call. . . (unit) on. . . (frequency).
CHECK Examine a system or procedure. (Not to be used in any other
context. No answer is normally expected.)
CLEARED ‡ Authorised to proceed under the conditions specified.
CLIMB ‡ Climb and maintain.
CONFIRM I request verification of: (clearance, instruction, action,
information).
CONTACT Establish communications with... (your details have been
passed).
CORRECT True or accurate.
CORRECTION An error has been made in this transmission (or message
indicated). The correct version is...
DESCEND ‡ Descend and maintain.
DISREGARD Ignore.
FANSTOP I am initiating a practice engine failure after take off. (Used only
by pilots of single engine aircraft.) The response should be,
“REPORT CLIMBING AWAY”.
FREECALL Call. . . (unit) (your details have not been passed – mainly used
by military ATC).
31 March 2011
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