NTC Restricted Radiotelephone Operator’s Certificate (RROC) – Aircraft Practice Test

When ATC transmits, you want to confirm you heard them without promising to follow the instruction yet. The term that does this best is Roger. It means the message was received, but it doesn’t indicate whether you will comply. If you intend to comply, you would use Wilco to signal you will follow the instruction. Over is used to close your transmission and prompt a reply, not just to acknowledge receipt. Affirm is a general yes, but it doesn’t convey that you’ve merely acknowledged receipt without committing to action.