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SESK: Stuff Everyone Should Know · sesk.info/hamg-ar-prosign

Which prosign marks the end of a formal message in CW?

AR.

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  1. AR ✔
  2. SK
  3. BK

Why: In Morse code, AR means "end of message." Other prosigns have different jobs, such as SK for ending contact and BK for break.

Huh, didn't know that: KN at the end of a transmission means you are listening only for a specific station or stations.

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You know you're a ham when your parrot squawks, "CQ, CQ, DE Polly!"
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References

Answer: AR. In Morse code, AR means "end of message." Other prosigns have different jobs, such as SK for ending contact and BK for break.

  1. NCVEC 2023-2027 General Class Pool and Syllabus (6th Errata, Feb 4 2026) ncvec.org/downloads/General%20Class%20Pool%20and%20Syllabus%202023-2027%20Public%20Release%20with%206th%20Errata%20Feb%204%202026.pdf
    AR
    Checked 2026-10-10.

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