Which precedence is identified by the prosign O?

The prosign O is associated with the precedence classified as "Immediate." In the context of communication and operations, the designation of Immediate indicates that the message should be transmitted as a high priority, as it pertains to urgent and time-sensitive matters that require prompt attention. Understanding this designation is critical for establishing effective communication protocols in environments where timely response can be essential, such as in emergency situations or operational commands.

This concept is rooted in military communications, where different precedences categorize messages based on urgency. Flash, for example, represents the highest level of urgency, while Priority signals a slightly lower level of priority. Emergency Command is associated with specific types of messages related to command authority under certain situations. Therefore, recognizing Immediate as the correct association of prosign O informs personnel of the importance of acting swiftly on those messages.