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The HWU transmitter is a French facility for transmitting orders to submerged submarines of the
thirteen guyed masts
(the tallest one 357 m, 6 of 310 m, 6 of 270 m), which are, together with the masts of the Allouis longwave transmitter, the tallest structures in France. The HWU transmitter works on 18.3 kHz, 20.9 kHz and 21.7 kHz. Its transmissions can be easily received in Europe when the transmitters are active by using a PC
*
The HWU transmitter is a French facility for transmitting orders to submerged submarines of the French Navy
The French Navy (french: Marine nationale, lit=National Navy), informally , is the maritime arm of the French Armed Forces and one of the five military service branches of France. It is among the largest and most powerful naval forces in t ...
. Situated near Rosnay at 46°42'47"N, 1°14'39"E, it is one of the largest radio transmitters in France and is visible on satellite pictures although it is completely blurred out. It uses an antenna carried bthirteen guyed masts
(the tallest one 357 m, 6 of 310 m, 6 of 270 m), which are, together with the masts of the Allouis longwave transmitter, the tallest structures in France. The HWU transmitter works on 18.3 kHz, 20.9 kHz and 21.7 kHz. Its transmissions can be easily received in Europe when the transmitters are active by using a PC
soundcard
A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under the control of computer programs. The term ''sound card'' is also applied to external audio ...
connected to a receiving coil and FFT
A fast Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT). Fourier analysis converts a signal from its original domain (often time or space) to a representation in the ...
software. Although the signals are very easy to receive, it may be impossible to decipher them without knowing the cipher and key used in the communications.
See also
* Sainte-Assise transmitter
The Sainte-Assise transmitter (french: Émetteur de Sainte-Assise) is a very low frequency (VLF) radio transmitter and military installation located on the grounds of the in the communes of Seine-Port, Boissise-la-Bertrand, and Cesson in the Se ...
* List of masts
The tallest structure in the world is the Burj Khalifa skyscraper at . Listed are guyed masts (such as telecommunication masts), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil platforms, electricity ...
* List of tallest structures in France
An incomplete list of the tallest structures in France. The list contains all types of structures, may be incomplete and should be expanded.
Overseas territories of France
See also
* List of tallest buildings in France
* List of tallest bu ...
* Torreta de Guardamar
Torreta de Guardamar (, ) or Torre de los Americanos is a 380-metre tall guyed radio mast erected by the US Navy near Guardamar del Segura, Spain. It was built in 1962 and is the tallest architectural structure in both the Iberian peninsula and ...
* Anthorn Radio Station
Anthorn Radio Station is a naval and government radio transmitting station located near Anthorn, Cumbria, England, overlooking the Solway Firth, and is operated by Babcock International (with whom former operators VT Communications are now me ...
* Skelton Transmitting Station
The Skelton Transmitting Station is a radio transmitter site at near Skelton, Cumbria, England, about north-west of Penrith, run by Babcock International and owned by the Ministry of Defence. Since the Belmont Mast in Lincolnshire was shor ...
{{coord, 46, 42, 47, N, 1, 14, 39, E, source:enwiki-plaintext-parser, display=title
Military radio systems
Towers in France
French Navy technology
Buildings and structures in Indre
Transmitter sites in France