What phraseology is used to approve a request?

The phraseology "APPROVED" following the request readback is standard in aviation communication to signify that a specific request has been granted. This format emphasizes clarity and directness, which are critical in ensuring that all parties understand that the request has been accepted. The use of the request readback beforehand allows the approving party to verify the specifics of what is being approved, ensuring there are no misunderstandings.

The structure of saying "APPROVED" after the request readback also follows conventions established in aviation phraseology guidelines, making it an appropriate response in a variety of operational contexts. This allows for a clear and concise communication that is easily understood and reduces the chance of miscommunication in operational settings.

Other options may not adhere to the standardized phraseology or might introduce ambiguity. For instance, stating "Request is approved" lacks the precise structural context found in the approved format, which could potentially lead to confusion in high-pressure situations where clarity is paramount.