HWU transmitter

Buildings and structures in IndreFrench Navy technologyMilitary radio systemsTowers in FranceTransmitter sites in France

The HWU transmitter is a French facility for transmitting orders to submerged submarines of the French Navy. 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 by 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 soundcard connected to a receiving coil and FFT 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.

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HWU transmitter
Route de Migné, Le Blanc

Geographical coordinates (GPS) Address Nearby Places
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Geographical coordinates (GPS)

Latitude	Longitude
N 46.713055555556 °	E 1.2441666666667 °

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Address

Route de Migné
36300 Le Blanc
Centre-Val de Loire, France
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Nearby Places

Rosnay, Indre

Rosnay (French pronunciation: [ʁonɛ]) is a commune in the Indre department in central France.

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The parc naturel régional de la Brenne (French pronunciation: [paʁk natyʁɛl ʁeʒjɔnal də la bʁɛn]; lit. 'Regional nature park of Brenne') is an 1,672 km2 (646 sq mi) large regional nature park located in the French department of Indre, France. It was founded December 22, 1982. Of old, La Brenne was a region in the old French provinces of Berry and Touraine, west of Châteauroux and east of Tournon-Saint-Martin. The park is cut in two by the river Creuse. Through the southern half flows the river Anglin. Historically, the southern part of the regional park is not really part of La Brenne. This part is called La petite Brenne. Historically, it was part of the Boischaut region. Like in all French national and regional parks, there still are people living in the park. The park has 47 communes, of which the capital is Le Blanc.

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