Morse code thus determines the dot length. It is common to assume that a word is 5 characters long. There are two common typical words: "PARIS" and "CODEX". PARIS mimics a word rate that is typical of natural language words and reflects the benefits of Morse code's shorter code durations for common characters such as "e" and "t". CODEX offers a word rate that is typical of 5-letter code groups (sequences of random letters). Using the word PARIS as a standard, the number of dot units is 50 and a simple calculation shows that the dot length at 20 words per minute
Morse code abbreviations only. To station S1 from station S2. Roger (R) Thank you (TU) see you again (CUAGN) Best regards (73) To station S1 from station S2: Signing off. In International Morse code there is no "distinct" dot-dash sequence defined only for the mathematical equal sign [=]; rather the same code ("–···–" or "dah di di di dah") is shared by "double hyphen" [=] and the procedural sign for "section separator" notated as . It is fairly common in the "Recommended International Morse Code" for punctuation codes to be shared with prosigns. For example, the code for plus or cross [+] is