Word/Phrases

Question 0

Affirmative

Answer 0

Yes

Question 1

Acknowledge

Answer 1

let me know that you have received and understood my message

Question 2

Correction

Answer 2

An error has been made in the transmission and the correct version follows.

Question 3

Expedite

Answer 3

Used by ATC when prompt compliance is required to avoid the development of an imminent situation

Question 4

Go Ahead

Answer 4

Proceed with your message. Not to be used for any other purpose.

Question 5

How do you hear me?

Answer 5

A question relating to the quality of the transmission or to determine how well the transmission is being received.

Question 6

Immediately

Answer 6

Used by ATC when compliance with an action is required to avoid an imminent situation.

Question 7

I Say Again

Answer 7

The message will be repeated.

Question 8

Negative

Answer 8

“No” or “Permission not granted” or “That is not correct”

Question 9

Over

Answer 9

My transmission is ended; I expect a response.

Question 10

Read Back

Answer 10

Repeat my message back to me.

Question 11

Roger

Answer 11

I have received all of your last transmission. It should not be used to answer a question requiring a “yes” or “no” answer.

Question 12

Say Again

Answer 12

Used to request a repeat of the last transmission. Usually specifies transmission or portion thereof not understood or received, e.g., “Say again all after ABRAM VOR”

Question 13

Stand by

Answer 13

Means the controller or pilot must pause for a few seconds, usually to attend to other duties of higher priority. Also means to “wait” as in “stand by for clearance” If a delay is lengthy, the caller should re-establish contact.

Question 14

Unable

Answer 14

Indicates inability to comply with a specific instruction, request, or clearance

Question 15

Wilco

Answer 15

I have received your message, understand it, and will comply with it.

Question 16

Words Twice

Answer 16

1. As a request: “Communication is difficult. Please say every phrase twice.”
2. As information: “Since communications are difficult every phrase in this message will be spoken twice.”