Wireless telegraphy
Also known as: radiotelegraphy
- 1Wireless telegraphy transmits text messages using radio waves instead of cables.
- 2The system relies on Morse code, consisting of dots and dashes of different lengths.
- 3Operators use a telegraph key to manually turn the transmitter on and off.
- 4Received signals are translated from audible beeps back into text by a trained operator.
Wireless telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using cables.
Connections1
primary communication method for agents
The Double-Cross System relied heavily on controlling the wireless transmissions of captured German agents to maintain the illusion that they were still operating freely.
Wireless telegraphy, also known as radiotelegraphy, is a method of transmitting text messages using radio waves. This technology functions similarly to traditional electrical telegraphy but eliminates the need for physical cables, allowing for long-distance communication through the air.
British Post Office engineers inspect Marconi 's transmitter (center) and receiver (bottom) on Flat Holm, May 1897Wikimedia Commons: File:Post_Office_Engineers.jpgIllustration from 1912 of a radiotelegraph operator on a ship sending an emergency SOS call for helpWikimedia Commons: File:Thesos.jpgA US Army Signal Corps radio operator in 1943 in New Guinea transmitting by radiotelegraphyWikimedia Commons: File:SCR188.jpg Information is encoded into pulses of radio waves of varying lengths, known as dots and dashes, which correspond to Morse code. In manual systems, an operator uses a telegraph key to control the transmitter, while the receiver converts these pulses into audible beeps. A skilled operator then translates these sounds back into readable text, enabling efficient and rapid communication across vast distances.