In 1901, Marconi is reputed to have sent the first transatlantic radio signal from south-western England to Newfoundland. Radiotelegraphy soon came to be used extensively, and its various applications ...

While the compliance deadline for oceangoing ships over 300 tons is May 1999, many GMDSS ships of other nations have been sailing since 1992 without the radiotelegraphy facilities of the earlier ...