GPS jamming exercises

12 October 2011

The Ministry of Defence conduct occasional tests on military systems which may result in some loss of service to civilian users of the Global Positioning System (GPS) including in-car navigation devices and networks which rely on GPS signals.

Ofcom seeks to provide citizens and consumers with information about possible interruptions to these services. It must be emphasised that this notification process only warns of future jamming exercises that are brought to the notice of Ofcom and may not cover all jamming exercises. It cannot be assumed that any loss of service is due to jamming exercises.

If you have any queries regarding these notices forward them to

Historic GPS Jamming Exercises

Please visit the National Archives to view these exercises.

Dates: The exercise will run over the period 27th March to 06th April 2017.

Times: Daylight hours and not at times of reduced visibility.

Location: N58° 36.16’, W004° 46.50’ (Faraid Head), N57° 51.89’, W005° 41.14’ (Loch Ewe), within 5km of N52° 00’ 53”, W003° 38’ 31” (Sennybridge). Additionally two low power GPS jammers will operate intermittently from a RN platform operating in a box with the following points as corners: 58 51N 5W, 58 51N 4.5W, 58 37.5N 5W, 58 34.5N 4.5W

Frequencies: 24 MHz bands centred around 1575.42 MHz and 1227.60 MHz.

As in previous exercises, Safety of Life operations will at all time take precedence over exercise activities.