Prosign · CW procedural signal
CT prosign in Morse code
'Attention — beginning a new transmission.' Also written KA in older references.
Morse pattern
-.-.-
Sent as one continuous shape — no inter-letter gap between the component letters.
Meaning
CT — Start of transmission (KA)
Notation
Written CT or KA (the older form).
When this is used
Used at the start of a formal message or net call to capture the attention of listeners. Less common in modern casual amateur use; net controllers still use it.
Examples
| On the air | Plain English |
|---|---|
| CT NET TIME 0200Z | Attention: net opens at 02:00 UTC. |
| CT QST DE W1AW | Attention: general broadcast from W1AW. |
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