Multiple sequential messages were often sent by "traffic handlers" during long traffic transmission sessions, and efficient work flow demanded formal separation of individual messages during long transmissions, This message separation is indicated by the prosign.
Multiple sequential messages were often sent by "traffic handlers" during long traffic transmission sessions. This was what this message separation is indicated by the prosign. Efficient work flow demanded formal separation of individual messages during long transmissions. This was what this message separation is indicated by the prosign.