PROCEDURE SIGNS (PROSIGNS)
PROSIGNS are one or more letters, characters or combinations thereof used to facilitate communication by conveying, in a condensed standard form, certain frequently used orders, instructions, requests, and information relating to commications.
| PROSIGN | MEANING |
| AA | All after |
| AB | All before |
| __ AR |
End of transmission (or end of message) |
| __ AS |
Wait |
| __ BT |
Long break (=) |
| C | Correct or YES |
| CL | Closing down station |
| __ CT |
Start of message (or transmission) |
| CQ | May be used as ALL station call when no other call sign available |
| DE | From |
| EEEEEEEE | Error |
| II | I Repeat |
| ___ IMI | I Repeat, or Please repeat |
| K | Invitation to transmit |
| __ KN |
Invitation for specific station to transmit |
| R | Received |
| __ SK |
End of all messages (or transmissions) |
| WA | Word after |
| WB | Word before |