A guide to codes and signals : international flag code, secret ciphers, weather signals, morse code, sign language, etc., with flags of all nations / by Gordon A.J. Petersen and Marshall McClintock ...

Morse code, often referred to as continuous wave (CW) in radio circles, has been gradually falling out of use for a long time now. At least in the United States, ham radio licensees don’t hav… ...

Maritime Morse code was formally phased out in 1999, but in California, a group of enthusiasts who call themselves the “radio squirrels” keeps the tradition alive.