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Semaphore

 

Semaphore is similar to Morse code in  that each letter of a message is translated into another form to allow  it to be more easily communicated. While Morse code is used to send  messages electronically over a telegraph line, semaphore is used to  visually communicate information over long distances.

To use  semaphore, an operator holds a flag or lighted wand in each hand. The  operator extends their arms to the correct position and pauses for each  letter of the message. "Attention" is the only signal that involves  movement and the "rest" position is the only time when the flags should  cross.

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