What phrase is used for repetition of an entire message?

The phrase used for the repetition of an entire message is "SAY AGAIN." This term is standardized in radio communication to clearly request the sender to transmit the entire message once more. It ensures clarity and comprehension, particularly in situations where the initial message may not have been fully understood or was obscured by noise or interference.

Using this phrase is important as it conveys the necessity for full repetition without ambiguity, which is vital in clear and efficient communication. In contrast, while the other phrases may be understood in casual contexts, they do not carry the same standardized meaning in formal communication protocols, which are essential for consistent and effective operations in radio transmission.