IFF Mark II
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IFF Mark II was the first operational identification friend or foe system. It was developed by the Royal Air Force just before the start of World War II. After a short run of prototype Mark Is, used e
The IFF Mark II antenna on this Spitfire can just be made out, stretching across the rear fuselage from the roundel to the tip of the horizontal stabiliser.
The IFF antenna can be seen on the left of this photo, meeting the fuselage in the RAF roundel. The lengthy antennas, which had to be placed on both sides of the fuselage, slowed the Spitfire by about 2 miles per hour (3.2 km/h). Rock of Gibraltar in background.
AMES Type 7
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The AMES Type 7, also known as the Final GCI, was a ground-based radar system introduced during World War II by the Royal Air Force. The Type 7 was the first truly modern radar used by the Allies, pro
Type 7 radar antenna at RAF Sopley in 1945. The happidrome visible in the background.
The Poling Chain Home installation as seen in 1945. On the left are the three (originally four) broadcast towers, on the right is the modified Adcock array of the receiver.
Despite a tremendous development effort, the AI Mk. IV was never consistently capable of reaching its design goal of 5 miles range.
The Type 80's enormous antenna provided very long range and very high accuracy, allowing it to combine the tasks of early warning and ground controlled interception.