ITU International Morse Code

This is the variety in use today. The timing rules are as follows:

• The basic length of time is a dot-length.
• A dash is 3 dot-lengths.
• The space between a pulse (dot or dash) is 1 dot-length.
• The space between letters is 3 dot-lengths.
• The space between words is 7 dot-lengths. (The space between words often varies between operators, so there is an option to vary this between 4 and 7 dot-lengths.)

A prosign is a sequence of consecutive letters sent without the normal space between the letters (i.e. they are run together). These sequences are usually written as e.g. SOS, and can be sent in this software with the letters enclosed between angle brackets e.g. <SOS>. The Morse produced by this would be, for example, ...- - -... rather than ...  - - -  ... This can be leveraged to produce any Morse sequence desired, by using single E(.) and T(-) letters in a prosign, e.g. <EETT> for ..- - For lists of the many prosigns, please consult a table elsewhere.

Punctuation accepted: & . , ? ! ' / ( )  : ; = + - _ " $ @
Special characters accepted: À Ä Å Ą Æ Ć Ĉ Ç Đ(D-stroke) Ð(Eth) É È Ę Ĝ Ĥ Ĵ Ł Ń Ñ Ó Ö Ø Ś Ŝ Š Þ Ü Ŭ Ź Ż (the CH digraph can be made by prosign <MM>).
 

American Railroad Morse Code

This is no longer used, but was used in the US decreasingly until the 1960s. There were many variants in timing of this code and there appears to have been no real official standard. So, I have chosen to rationalize things as follows:

• The basic length of time is a dot-length.
• A dash is 2 dot-lengths. (It seems this lengthened over time to 3 dot-lengths, probably as a result of the inherent distortion caused by longer telegraph lines being introduced.)
• The space between a pulse (dot or dash) is 1 dot-length.
• The space between letters is 3 dot-lengths. (The figure is nominal; I can find no real evidence of a definite length used. However, it obviously should be longer than the space between pulses (and the 2-dot-length spaces in certain letters) but shorter than the space between words.)
• The space between words is 7 dot-lengths. (The figure is nominal; I can find no real evidence of a definite length used. However, it obviously should be longer than the space between letters.)

It should be noted that (unlike ITU International Morse) some letters in American Morse contain a 2-dot-length space somewhere within them (C, O, R, Y, Z, &). L is represented by a 4-dot-length dash; 0 by a 6-dot-length dash (this often seemed to vary). Please see a code table for details.

Punctuation accepted: & . , ? !
Special characters accepted: none.
 

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