Radiotelegraphy is a method of wireless communication that uses radio waves to transmit messages in Morse code. This technique allows information to be sent over long distances without the need for physical connections like wires. It was widely used in maritime communication and by military forces before the advent of more advanced technologies. The invention of radiotelegraphy is attributed to Guglielmo Marconi, who successfully demonstrated its capabilities in the late 19th century. This technology played a crucial role in connecting ships at sea and facilitating communication during emergencies, significantly improving safety and coordination in various fields.