In 1912 at the Radiotelegraphic Convention meeting in London, it was decided that all radio signals would be sent using International Morse. Thus the confusion of various operators inter-mixing the two code was eliminated.

American Morse remained the standard for U.S. landline telegraph companies, as it could be sent about 5% faster than International Morse. American Morse was also commonly used for domestic radio traffic on the Great Lakes and along the coasts. International Morse was used on ocean-going vessels. Many shipboard operators were skilled at using both versions of the Morse code.

Today, American Morse is nearly extinct. It was last used by the railroads. Some Civil War re-enactments use American Morse for historical accuracy.

The original Morse Code A . _ O . .

B _ . . . P . . . . .

C . . . Q . . _ .

D _ . . R . . .

E . S . . .

F . - . T _

G _ _ . U . . _

H . . . . V . . . _

I . . W . _ _

J _ . _ . X . _ . .

K _ . _ Y . . . .

L ____ (long dash) Z . . . .

M _ _

N _ .



1 . _ _ . 6 . . . . . .

2 . . _ . . 7 - - . .

3 . . . _ . 8 _ . . . .

4 . . . . _ 9 _ . . _

5 _ _ _ 0 _______ (very long dash)

Samuel Morse The difference between the Morse and the Continental (International) codes Morse Continental

C . . . C _ . _ .

F . _ . F . . _ .

J _ . _ . J . _ _ _

L ___[long dash] L . _ . .

O . . O _ _ _

P . . . . . P . _ _ .

Q . . _ . Q _ _ . _

R . . . R . _ .

X . _ . . X _ . . _

Y . . . . Y _ . _ _

Z . . . . Z _ _ . .





1 . _ _ . 1 . _ _ _ _

2 . . _ . . 2 . . _ _ _

3 . . . _ . 3 . . . _ _

5 _ _ _ 5 . . . . .

6 . . . . . . 6 _ . . . .

7 _ _ . . 7 _ _ . . .

8 _ . . . . 8 _ _ _ . .

9 _ . . _ 9 _ _ _ _ .

0 _______ 0 _ _ _ _ _ The Continental Morse Code was accepted as the International Morse Code and was used worldwide. The original Morse Code became the American Morse Code and was used for railroad telegraphy in the United States through the 1960's. American Morse



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