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{{WikiProject Cryptography |importance=Low}}
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== Origin? ==
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Thus, there came a day when I caught the code at the right initial, listened to two clear sentences of conversation, and, the next time they talked, failed to understand a word. But that first time!</blockquote> <!-- Template:Unsigned IP --><small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/165.225.48.113|165.225.48.113]] ([[User talk:165.225.48.113#top|talk]]) 02:43, 26 June 2019 (UTC)</small> <!--Autosigned by SineBot-->
== Error in Article. ==
The article says, "Morse code is harder to send by tapping or banging because it requires the ability to create two clearly distinguishable forms of tap, such as varying the pitch or volume."
I am a amateur radio operator, Morse code has nothing to do with pitch or volume. It is timing of tone and no tone.
See https://en.wikipedia.org/wiki/Morse_code "Representation, timing, and speeds".<br />
International Morse code is composed of five elements:<br />
1. dit ( ▄ ): is one time unit long<br />
2. dah ( ▄▄▄ ): three time units long<br />
3. inter-element gap between the dits and dahs within a character: one dot duration or one unit long<br />
4. short gap (between letters): three time units long<br />
5. medium gap (between words): seven time units long.<br />
Revised sentance, "Morse code is harder to send by tapping or banging because Morse code is time based on signal present or not present."<br /><br />Changed article on 2-jul-2024.<br />
[[User:Jchaney44145|Jchaney44145]] ([[User talk:Jchaney44145|talk]]) 21:51, 1 July 2024 (UTC)
:"tap tap tap {{nbsp}} BANG BANG BANG {{nbsp}} tap tap tap" and someone tapping two different objects against a wall could still be decoded as Morse. I think they're useful examples, for setting up the context of the tap code being more practical when you don't have two different-sounding objects, or have to keep quiet. [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 15:18, 2 July 2024 (UTC)
::Morse code sounds like this, https://www.arrl.org/5-wpm-code-archive. It is one tone and the timing matters. [[Special:Contributions/2603:6011:9000:186:E5D9:5F76:A53D:E70F|2603:6011:9000:186:E5D9:5F76:A53D:E70F]] ([[User talk:2603:6011:9000:186:E5D9:5F76:A53D:E70F|talk]]) 03:23, 5 July 2024 (UTC)
:::Sources about US prisoners of war in Vietnam explicitly refer to the use of two-"tone" taps and thumps to send Morse code, and how this was superseded by the tap code. I've added Jeremiah Denton's memoir as a reference. [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 09:14, 5 July 2024 (UTC)
::::I understand that you have read about Morse code. I can tell you that I have sent and received it myself and understand how it works. What is your experience level? [[Special:Contributions/2603:6011:9000:186:F80E:8651:6237:A4BE|2603:6011:9000:186:F80E:8651:6237:A4BE]] ([[User talk:2603:6011:9000:186:F80E:8651:6237:A4BE|talk]]) 12:28, 6 July 2024 (UTC)
:::::Thanks, I understand what Morse code is. Do you have any concerns about the current wording of the article? [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 12:46, 6 July 2024 (UTC)
::::Let’s agree with this edit.
::::”By comparison, Morse code being time based, is harder to send by tapping or banging. Its short and long signals can be improvised as taps and thumps, or short and long whistles or scraping sounds, but tap codes are simpler to learn and can be used in a wider variety of situations.”
::::I am not saying that others have not improvised sending Morse code using other methods. All I am looking for is to have this article convey correct information about Morse code. I have the experience, do you? [[Special:Contributions/2603:6011:9000:186:F80E:8651:6237:A4BE|2603:6011:9000:186:F80E:8651:6237:A4BE]] ([[User talk:2603:6011:9000:186:F80E:8651:6237:A4BE|talk]]) 12:48, 6 July 2024 (UTC)
:::::What do you see as incorrect here, what are you suggesting should be changed? [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 12:56, 6 July 2024 (UTC)
::::::Change “ By comparison, despite its messages being shorter, Morse code is harder to send by tapping or banging.”
::::::to “By comparison, Morse code being time based, is harder to send by tapping or banging.”
::::::This would be more accurate. [[Special:Contributions/2603:6011:9000:186:F80E:8651:6237:A4BE|2603:6011:9000:186:F80E:8651:6237:A4BE]] ([[User talk:2603:6011:9000:186:F80E:8651:6237:A4BE|talk]]) 13:06, 6 July 2024 (UTC)
:::::::"Time based" isn't a very clear explanation, but regardless I don't see why that would make it harder to send. Denton's "a prisoner might tap once on the wall for a dot and thump with his fist for a dash" seems no more difficult than the same prisoner whistling or scraping to send monotone morse.
:::::::Do you think it's incorrect to say that Morse code messages are shorter than tap code messages? [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 13:17, 6 July 2024 (UTC)
::::::::Wow, you are such the knowledgeable expert on this topic. I am glad you know more about Morse code than me.
::::::::I was just wanting to correct mistakes in the article.
:::::::: --. -... [[Special:Contributions/2603:6011:9000:186:F80E:8651:6237:A4BE|2603:6011:9000:186:F80E:8651:6237:A4BE]] ([[User talk:2603:6011:9000:186:F80E:8651:6237:A4BE|talk]]) 13:28, 6 July 2024 (UTC)
::::::::Belbury, google vband and try to get above 15 WPM. Thank you.
::::::::https://hamradio.solutions/vband/ [[Special:Contributions/2603:6011:9000:186:F80E:8651:6237:A4BE|2603:6011:9000:186:F80E:8651:6237:A4BE]] ([[User talk:2603:6011:9000:186:F80E:8651:6237:A4BE|talk]]) 13:52, 6 July 2024 (UTC)
No matter how great Morse code is in some contexts, prisoners do not seem to have found it to be as convenient or useful as tap code in most cases. For tap code, all you need is your fist and a wall, while for Morse code, you need something else in addition, and that something else could then be taken away by the jailers, or if the something else makes a louder noise than your fist when it hits the wall, then it could cause the jailers to become suspicious, etc. etc... [[User:AnonMoos|AnonMoos]] ([[User talk:AnonMoos|talk]]) 18:48, 7 July 2024 (UTC)
== C/K or I/J? ==
This article says that C and K share a tap code, whereas the linked article for the Polybius square says that I and J share a tap code. Which is correct? [[Special:Contributions/2603:9001:6B00:3337:A97B:3A20:C46F:4E12|2603:9001:6B00:3337:A97B:3A20:C46F:4E12]] ([[User talk:2603:9001:6B00:3337:A97B:3A20:C46F:4E12|talk]]) 04:33, 14 August 2025 (UTC)
:The Polybius square article doesn't seem to give a clear source for I/J, but the PBS source in this one confirms C/K as being in use during the Vietnam war:{{tqb|One of the famous, yet inelegant, usages of the letter "c" for "k" was in the transmission "Joan Baez Succs," which POWs sent around the camp after the American anti-war activist's songs were played over the camp's public address system.}}
:To speculate, I'd guess that both are correct and there's been a historical shift. The letter J [[J#History|started as a variant of I]] in the 16th century, so somebody using a Polybius square closer to that time would have seen it as fairly natural to merge those two letters. To a 1970s Vietnam POW, though, merging the soundalike Cs and Ks would be more intuitive - especially in a context where the message isn't being written down. [[User:Belbury|Belbury]] ([[User talk:Belbury|talk]]) 10:43, 14 August 2025 (UTC)
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