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Last Updated: Wednesday March 30 2005 10:31 GMT

Worksheet: Morse Code

Morse code cracker
A .- N -. Zero -----
B -... O --- 1 .----
C -.-. P .--. 2 ..---
D -.. Q --.- 3 ...--
E . R .-. 4 ....-
F ..-. S ... 5 .....
G --. T - 6 -....
H .... U ..- 7 --...
I .. V ...- 8 ---..
J .--- W .-- 9 ----.
K -.- X -..- . .-.-.-
L .-.. Y -.-- , --..--
M -- Z --.. ? ..--..

History

The Morse code was invented in America in 1835 by American painter Samuel Morse and Alfred Vail.

It became the first form of radio communication and a global language which could be transmitted by flashes of light as well as sound.

It was used to send and receive military messages during several wars and was used by sailors up until 1997.

The first and most famous use in the UK of the classic "dot-dot-dot dash-dash-dash dot-dot-dot" SOS emergency signal was from the Titanic on its doomed maiden voyage in 1912.

It also famously led to the arrest of British murderer Dr Crippen in 1910. He fled the UK by boat to Canada but thanks to a Morse Code radio message sent across the Atlantic he was arrested on arrival.




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