What Is the CL Prosign in Morse Code?
CL is the prosign meaning closing station / going off the air. The letters C and L are sent run-together as one 8-signal symbol.
When you search for “cl prosign in morse code”, “morse code for cl prosign”, or “CL in morse code”, the answer is the same ITU-standard pattern: -.-..-... Other common names for this prosign include closing station, going off air, clear.
When to Use the CL Prosign
Sent at the very end of an operating session, after SK, to inform any listening stations that you are shutting down the rig and will not be answering further calls.
Practice: What Is the Morse Code for the CL Prosign?
Select the correct Morse code for the cl prosign (CL):
How to Tap the CL Prosign in Morse Code
To transmit the cl prosign (-.-..-..), use this sequence:
ITU Timing Rules
- Dot (·) = 1 unit
- Dash (−) = 3 units (3× longer)
- Signal gap = 1 unit
- Letter gap = 3 units
- Word gap = 7 units
Timing Reference Table
| Speed | Dot | Dash | Letter gap | Word gap |
|---|---|---|---|---|
| 5 wpm | 240ms | 720ms | 720ms | 1680ms |
| 10 wpm | 120ms | 360ms | 360ms | 840ms |
| 17 wpm (this page) | 70ms | 210ms | 210ms | 490ms |
| 20 wpm | 60ms | 180ms | 180ms | 420ms |
How to Remember the CL Prosign in Morse Code
“Closing Link” — Hear C (−·−·) then L (·−··) blend: long-short-long-short-short-long-short-short. The longest of the common prosigns.
Frequently Asked Questions — CL Prosign in Morse Code
The cl prosign (CL) in Morse code is -.-..-.. (5 dots, 3 dashes). It’s the standard ITU code used worldwide.
The Morse code for the cl prosign is -.-..-... Tap the sequence as: dash, dot, dash, dot, dot, dash, dot, dot, with a one-unit gap between each signal.
To send the cl prosign: long press, then short tap, then long press, then short tap, then short tap, then long press, then short tap, then short tap. Keep one unit of silence between each signal and three units between this character and the next.
The cl prosign uses 8 signals total: 5 dots and 3 dashes.
Sent at the very end of an operating session, after SK, to inform any listening stations that you are shutting down the rig and will not be answering further calls.
Yes — -.-..-.. is defined by the ITU (International Telecommunication Union) Recommendation M.1677 and is used worldwide for the cl prosign.
Related Morse Code Prosigns
Other prosigns commonly used alongside the cl prosign: