Anthorn VLF transmitter

The Anthorn transmitter is a VLF transmitter near Anthorn, Cumbria, which is used for transmitting orders to submarines on 19.6 kHz. The callsign is GBZ.

The characteristic triangular pattern of roads clearly visible on the tells us that this was a World War II military airfield, in this case operated by the Royal Navy Air Service and calling itself HMS Nuthatch. It is now operated by VT Communications.

National Physical Laboratory time signal

Early in 2007 the NPL will transfer Britain's national time signal transmissions to VT Communications at the Anthorn VLF transmitter. 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 of the relocated facility will be 1 April 2007, when the name of the service will change to "The time from NPL" and the signal from Rugby switched off.

External links

* Russell W. Barnes' page about the wartime history
* Pictures of Anthorn
* http://maps.google.co.uk/maps?ie=UTF8&ll=54.911227,-3.279997&spn=0.020525,0.058537&t=h&om=1