Before revision: With American Morse it was far more difficult to avoid timing errors, because there were several more close symbol timings than there are in International Morse ; International Code has only two symbols, dits () and dahs (), but the American code had three lengths of dash and two lengths of spaces between dots.
After revision: With American Morse it was far more difficult to avoid timing errors, because there were more symbol timings than there are in International Morse ; International Code has only two symbols, dots () and dashesand some were difficult to distinguish because of their closeness (), but the American code had three lengths of dash and two lengths of spaces between dots.