What Is the HH Prosign in Morse Code?
HH is the prosign for error / correction. It is sent as eight consecutive dots (two H’s run together) — the universal CW signal that the previous word was wrong.
When you search for “hh prosign in morse code”, “morse code for hh prosign”, or “HH in morse code”, the answer is the same ITU-standard pattern: ......... Other common names for this prosign include error, correction, eight dots.
When to Use the HH Prosign
Send HH immediately after a typing or sending mistake, then re-send the last word correctly. It is the official ITU correction symbol used worldwide in CW.
Practice: What Is the Morse Code for the HH Prosign?
Select the correct Morse code for the hh prosign (HH):
How to Tap the HH Prosign in Morse Code
To transmit the hh 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 HH Prosign in Morse Code
“Haha — I goofed.” Eight quick dots in a row sound like a stutter or a giggle: dididididididit.
Frequently Asked Questions — HH Prosign in Morse Code
The hh prosign (HH) in Morse code is ........ (8 dots, 0 dashes). It’s the standard ITU code used worldwide.
The Morse code for the hh prosign is ......... Tap the sequence as: dot, dot, dot, dot, dot, dot, dot, dot, with a one-unit gap between each signal.
To send the hh prosign: short tap, then short tap, then short tap, then short tap, then short tap, then short tap, then short tap, then short tap. Keep one unit of silence between each signal and three units between this character and the next.
The hh prosign uses 8 signals total: 8 dots and 0 dashes.
Send HH immediately after a typing or sending mistake, then re-send the last word correctly. It is the official ITU correction symbol used worldwide in CW.
Yes — ........ is defined by the ITU (International Telecommunication Union) Recommendation M.1677 and is used worldwide for the hh prosign.
Related Morse Code Prosigns
Other prosigns commonly used alongside the hh prosign: