RAF Stenigot, August 2013

Author zeroUE - Last updated: 31.12.2013

RAF Stenigot was opened in 1940 as an east coast Chain Home radar station. Stenigot provided long range early warning for raids from Luftflotte V and the northern elements of Luftflotte II along the approaches to Sheffield and Nottingham and the central midlands.

East coast stations were built to the same design as the experimental radar establishment set up at Bawdsey in 1936 consisting of a protected transmitter and receiver block with transmitter aerials suspended from four 350′ steel towers and the receiver aerials mounted on four 240′ timber towers. The operations blocks of an east coast CH are classified as Type A with a 5′ 6″ layer of shingle on the roof to disperse blast, and earth banks around them.

RAF Stenigot was also provided with a buried reserve which consisted of duplicate transmitter and receiver blocks at a dispersed location.

The stand-by set house, which at Stenigot has now been demolished, was of similar construction.

RAF Stenigot was in Ludford Magna Sector (PRO file Air 25/681) under the jurisdiction of 73 Wing.

In 1941/1942 RAF Stenigot was also fitted with a GEE Ground Station Type 7000 (PRO file Air 25/681). GEE was highly effective and accurate as an aid to navigation, but it lacked the pin-point accuracy needed for a bombing attack on a selected target. A British scientist Alec Reeves developed a through-the-clouds bombing technique known as OBOE. By mid-1944 the principle of OBOE was combined with GEE and a blind bombing technique known as GEE H was developed allowing strikes to be made on difficult-to-hit targets. The station at St. Stenigot was upgraded to GEE H in the 1950′s with two identical operations blocks replacing the 1941 GEE hut.

After the war, the station remained operational as part of the ‘defended area’, a line of chain home stations running down the east coast from Flamborough Head in Yorkshire and along the south coast to Portland Bill in Dorset.

Some of those stations were unmanned, the rest were only staffed during daylight hours cognizant with the then-current as the Soviet threat.

Stenigot was retained as a CH station during the early stages (Phase 1 & 2) of the ROTOR 1 programme which was evolved in 1950 to re-establish an effective air defence radar network.

The existing equipment was modified and renovated to provide temporary cover during the construction of the new protected radar sites.

Following the full implementation of ROTOR Stenigot was taken off line and placed in care and maintenance.

In 1959, Stenigot was selected as part of NATO’s Ace High communications programme developed in the mid 1950′s.

Ace High was a tropospheric scatter/microwave link system providing an exclusive communications network comprising 49 tropospheric scatter links and 40 line-of-sight microwave links. It extended from northern Norway and through central Europe to eastern Turkey and included 570 voice, 260 telegraph and 60 data circuits at 84 sites.

The Ace High station utilized 4.72 acres of the former CH site between the earlier transmitter and receiver blocks. It was enclosed within a security fence and provided with high intensity lighting. A two storey police house stood at the entrance gate part way along a track running north west from the road. The most prominent feature was two pairs of parabolic dish antenna, 60 feet in diameter supported on seven lattice steel girder legs.

The transmitters, receivers and power supplies were located in a single storey brick building between the pairs of dishes.

With the development of new microwave communications technology in the 1980′s, tropospheric scatter systems became redundant and the Ace

High network was abandoned in the early 1990′s and the stations closed.

The equipment and buildings were removed in 1996 although the four parabolic dishes can still be seen lying on the ground close to the old chain home receiver block. All the other buildings connected with Ace High, including the police house have been demolished with only the concrete bases remaining to indicate their former positions.

Information above courtesy of the excellent site Subterranea Brittanica http://www.subbrit.org.uk/rsg/sites/s/stenigot/

In addition the initials ACE are short for Allied Command Europe. All references to CH in photo comments are Chain Home, all references to AH are Ace High.

The 4 AH communications dishes






"NATO Equipment for project Ace High". I cannot read the third line, it may start with the word Contract








CH Transmitter Block in front of the CH Radar Transmitter mast, the last remaining mast on site


On to the CH Transmitter Bunker


Main entrance to room 1












Blocked off doorway, this originally led to room 2










Some type of emplacement near the outer entrance to room 2


Inside room 2




The CH Transmitter mast. As this is still a live training facility I did not enter the compound, but I think you get an idea of the scale of it


thanks for looking!


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