Affirmative Yes

Copy "Ready to copy.", "I am ready to copy" message.

Copy by intercept Overheard information acknowledged, no need to repeat.

Disregard Ignore previous

Emergency Traffic Suspend current activities and respond to Emergency.

ETA Estimated time or arrival. "What is your ETA?"

How copy? Loud and clear / Medium and readable / Weak and unreadable

Is this frequency in use? Inquire if frequency is unused. Proceed if nothing heard.

Negative No

Request permission to secure

Roger Confirm, does not mean "yes". Acknowledge message receipt.

Say again I say again <subject> example: I say again "City: San Rafael".

Wait Stop transmitting and wait until called.

When necessary to identify any letter of the alphabet, use the standard phonetic alphabet

Letter	Phonetic	Letter	Phonetic	Letter	Phonetic
A	ALFA	J	JULIET	S	SIERRA
B	BRAVO	K	KILO	T	TANGO
C	CHARLIE	L	LIMA	U	UNIFORM
D	DELTA	M	MIKE	V	VICTOR
E	ECHO	N	NOVEMBER	W	WHISKEY
F	FOXTROT	O	OSCAR	X	XRAY
G	GOLF	P	PAPA	Y	YANKEE
H	HOTEL	Q	QUEBEC	Z	ZULU
I	INDIA	R	ROMEO