Radio Telephony
Refer: AIP GEN 3.4(5)
A	ALFA	AL fah	N	NOVEMBER	no VEM ber
B	BRAVO	BRAH voh	O	OSCAR	OSS cah
C	CHARLIE	CHAR lee or SHAR lee	P	PAPA	pah PAH
D	DELTA	DELL tah	Q	QUEBEC	keh BECK
E	ECHO	ECK ho	R	ROMEO	ROW me oh
F	FOXTROT	FOKS trot	S	SIERRA	see AIR rah
G	GOLF	GOLF	T	TANGO	TANG go
H	HOTEL	ho TELL	U	UNIFORM	YOU nee form or OO nee form
I	INDIA	IN dee A	V	VICTOR	VIK tah
J	JULIETT	JEW lee ETT	Q	WHISKEY	WISS key
K	KILO	KEY loh	X	X-RAY	ECKS ray
L	LIMA	LEE mah	Y	YANKEE	YANG key
M	MIKE	MIKE	Z	ZULU	ZOO loo
For pronunciation, syllables to be emphasised are in all capitals.
Radio Telephony
Refer: AIP GEN 3.4(5)
0	ZE-RO	5	FIFE	Decimal	DAY-SEE-MAL
1	WUN	6	SIX	Hundred	HUN-dred
2	TOO	7	SEV-en	Thousand	TOU-sand
3	TREE	8	AIT
4	FOW-er	9	NIN-er
The syllables printed in capital letters in the above list are to be stressed.
Radio Telephony
Refer: AIP GEN 3.4(5)
ACKNOWLEDGE	Let me know that you have received and understood this message.
AFFIRM	Yes.
APPROVED	Permission for proposed action granted.
BREAK	I hereby indicate the separation between portions of the message (to be used where there is no clear distinction between the text and other portions of the message).
BREAK BREAK	I hereby indicate separation between messages transmitted to different aircraft in a very busy environment.
CANCEL	Annul the previously transmitted clearance.
CHECK	Examine a system or procedure (no answer is normally expected).
CLEARED	Authorised to proceed under the conditions specified.
CONFIRM	I request verification of: (clearance, instruction, action, information).
CONTACT	Establish communication with...
CORRECT	True or Accurate.
CORRECTION	An error has been made in this transmission (or message indicated) the correct version is...
DISREGARD	Ignore.
HOW DO YOU READ	What is the readability of my transmission? The readability scale is: 1. Unreadable 2. Readable now and then 3. Readable but with difficulty 4. Readable 5. Perfectly readable.
Radio Telephony
Refer: AIP GEN 3.4(5)
I SAY AGAIN	I repeat for clarity or emphasis.
MAYDAY	My aircraft and its occupants are threatened by grave and imminent danger and/or I require immediate assistance.
MAINTAIN	Continue in accordance with the condition(s) specified or in its literal sense, e.g. “Maintain VFR”.
MONITOR	Listen out on (frequency).
NEGATIVE	No or Permission is not granted or That is not correct or Not capable.
OUT	This exchange of transmissions is ended and I expect no response from you (not normally used in VHF or satellite communication).
OVER	My transmission is ended and I expect a response from you (not normally used in VHF or satellite communication).
PAN PAN	I have an urgent message to transmit concerning the safety of my aircraft or other vehicle or of some person on board or within sight but I do not require immediate assistance.
READBACK	Repeat all, or the specified part, of this message back to me exactly as received.
RECLEARED	A change has been made to your last clearance and this new clearance supersedes your previous clearance or part thereof.
REPORT	Pass me the following information.
REQUEST	I should like to know or I wish to obtain.
ROGER	I have received all of your last transmission (under NO circumstances to be used in reply to a question requiring READBACK.
Radio Telephony
Refer: AIP GEN 3.4(5)
SAY AGAIN	Repeat all or the following part of your last transmission.
SPEAK SLOWER	Reduce your rate of speech.
STANDBY	Wait and I will call you.
UNABLE	I cannot comply with your request, instruction or clearance (normally followed by a reason).
VERIFY	Check and confirm with originator.
WILCO	I understand your message and will comply with it.
WORDS TWICE	a. as a request: Communication is difficult. Please send every word or group of words twice. b. as information: Since communication is difficult every word or group of words in this message will be sent twice.
Document Metadata	Radio Telephony
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source hosted at: https://gitlab.com/system-f/documentation/miscellaneous
last updated at time: 2025-11-21 04:13:34 UTC by Tony Morris <tonymorris@gmail.com>
revision: 04f62baa9b6349a20e84923537d48f4f1ef6d4a0	Page 4 of 4
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