Morse code is a method of transmitting electrical signals that are combinations of long and short sounds, flashes of light or electrical pulses – like a torch that flicks on and off. To understand the messages, the code must be known: the Morse alphabet. Samuel Morse, an American, invented it in 1833. The alphabet consists of dots and dashes: A dot stands for a short signal, a dash for a long one. An S is written as …, an O as – – – . This Means the emergency signal SOS is ‘… – – – …’ – three dots, three dashes, three dots. Amateur radio operators and telegraphy use this Morse code even today.
