1938 merit badge requirements
- Send and receive by Semaphore Code at the rate of not fewer than forty-eight letters per minute, or in the General Service (International Morse) Code, not fewer than twenty-four letters per minute.
- Send and receive signals by sound, using the buzzer, sounder, whistle, or bugle.
- Make an electric buzzer outfit, wireless outfit, blinker, or a heliograph outfit and send a message of not less than twenty-four letters with the same.
1945, 1950 merit badge requirements
- Make an electric buzzer outfit, wireless, blinker, or other signaling device.
- Send and receive in the International Morse Code, by buzzer or other sound device, a complete message of not less than 35 words, at a rate of not less than 35 letters per minute.
- Demonstrate an ability to send and receive a message in the International Morse Code by wigwag and by blinker or other light signaling device at a rate of not less than 20 letters per minute.
- Send and receive by Semaphore Code at the rate of not less than 30 letters per minute.
- Know the proper application of the International Morse Code and Semaphore Codes; when, where, and how they can be used to best advantage.
- Discuss briefly various other codes and methods of signaling which are in common use.
| The official source for the information shown in this article or section is:|
Handbook for Boys, 1946 Edition