Morse code: Difference between revisions

Revision as of 19:47, 23 August 2025

Revision as of 20:00, 23 August 2025

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=== Cut numbers ===

Most numbers have an unofficial short-form, given in the table below. They are only used when both the sender and the receiver understand that numbers, and not letters, are intended;{{citation needed|date=October 2023}} for example, one often sees the most common [[R-S-T system|R-S-T signal report]] rendered as '''{{small|5}}{{sc|NN}}'''[[#double_dagger_anchor|{{sup|[‡]}}]] instead of '''{{small|599}}'''.{{citation needed|date=October 2023}}

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! 4

| {{grey|{{n/a|N/A}}[[#dagger_anchor|{{sup|[†]}}]]}}

|style="text-align:center;"| '''{{small|4}}'''[[#dagger_anchor|{{sup|[†]}}]]

| {{morse|dot|dot|dot|dot|dash}}[[#dagger_anchor|{{sup|[†]}}]]

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! 5

| {{morse|dot}}{{sup|[[#double_dagger_anchor|{{sup|[‡]}}]]}}

|style="text-align:center;"| {{grey|'''{{sc|e}}''' ''or''}} '''{{small|5}}'''[[#double_dagger_anchor|{{sup|[‡]}}]]

| {{morse|dot|dot|dot|dot|dot}}[[#double_dagger_anchor|{{sup|[‡]}}]]

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! 6

| {{grey|{{n/a|N/A}}[[#dagger_anchor|{{sup|[†]}}]]}}

|style="text-align:center;"| '''{{small|6}}'''[[#dagger_anchor|{{sup|[†]}}]]

| {{morse|dash|dot|dot|dot|dot}}[[#dagger_anchor|{{sup|[†]}}]]

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|style="text-align:center;"| {{anchor|asterisk_anchor}}[*] || Codes that are ''not'' cut numbers, or are not numbers, are {{grey|'''shaded grey'''}} in the table.

|- style="vertical-align:top;"

|style="text-align:center;"| {{anchor|dagger_anchor}}[†] || There are no distinct cut-number codes for '''{{small|4}}''' or '''{{small|6}}''', since cut numbers are made by reducing multiple ''dahs'' in the standard Morse number codes to only one ''dah'', but keeping all the ''dits'' as-is; digits '''{{small|4}}''' and '''{{small|6}}''' already only have one ''dah''.

|- style="vertical-align:top;"

|style="text-align:center;"| {{anchor|double_dagger_anchor}}[‡] || Some operators just send the standard code for '''{{small|5}}''', even when using other cut numbers, since five ''dits'' are still fairly short (same duration as {{nobr|cut  '''{{small|3}}'''}} and {{nobr|cut  '''{{small|7}}'''),}} and one might imagine a single ''dit'' possibly being misinterpreted as either a mistaken {{nobr|cut  '''{{small|1}}'''}} or cut decimal point.{{citation needed|date=October 2023}}

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