Anthorn VLF transmitter
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  Map sources for Anthorn VLF transmitter at grid reference NY179581
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The Anthorn transmitter is a VLF transmitter near Anthorn, Cumbria, used for transmitting orders to submarines on 19.6 kHz. The callsign is GBZ.
The transmitter is a NATO facility, controlled from Northwood Headquarters along with three other VLF transmitters in Norway, Germany, and Italy.[1]
The characteristic triangular pattern of roads clearly visible on the aerial photograph tells us that this was a World War II military airfield, in this case operated by the Royal Navy Air Service as HMS Nuthatch. It is now operated by VT Communications.
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[edit] National Physical Laboratory time signal
Early in 2007 the NPL will transfer Britain’s national time signal transmissions to Anthorn. The signals will have the same power and frequency as the existing signal from MSF Rugby : effective radiated power of 15 kW at 60 kHz. The formal inauguration will be 1 April 2007, when the name of the service will change to “The time from NPL” and the signal from Rugby will be switched off.
[edit] Further reading
- Hall, L.L. (1965). Anthorn Very-Low-Frequency Radio Station. Post Office Electrical Engineers' Journal, Vol. 58 (July 1965), p.114.
[edit] References
- ^ John Ainslie (October 2005). The Future of the British Bomb. Clydeside Press.
[edit] External links
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