Every engine whistle, horn signal, or combination of the two has a meaning dictated by the Northeast Operating Rules Advisory ...

The use of SOS soon became universal, and the standard signal ruled the high seas until early 1999. Then, in an agreement engineered by the United Nations, Morse Code itself was officially retired ...

We talk about Morse code, named after its inventor ... By 1838, a two-mile cable carried a signal from the Speedwell Ironworks. Morse and Vail demonstrated the system to President Van Buren ...

Militaries use immersion language instruction, as do diplomats and journalists, and apparently computers can now use it to teach themselves Morse code ... Morse out of a signal with -6 dB signal ...

The signals were sent in Morse code from Poldhu, Cornwall, in England. Marconi later wrote about the experience: Shortly before midday I placed the single earphone to my ear and started listening.