Hazel Picking, who has died aged 100, was a visual signaller in the WRNS during the Second World War. As a Girl Guide, Hazel Roberts (as she was born) had been good at Morse and semaphore, and, coming ...

Tony Ingesson does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Morse code, the language of the telegraph, is a system of communication that's composed of combinations of short and long tones that represent the letters of the alphabet. The tones are sometimes ...