Morse code is made up of dots and dashes. How did telegraph operators keep from losing track of where one letter ended and another began?

Question

In the movies, morse code comes through so fast it’s hard to tell a dot from a dash. Hoe did they keep from getting lost?

In: 1001

Answer 1

Morse dit, dah, and space lengths are defined in the code’s specification. I don’t remember the exact ratio. But I send and receive morse. Spaces are clear.