It was one of the company's successful heavy radar projects, winning the contract for many of the ROTOR stations in the UK and additional sales around the world with a total production run of about 40 examples.
This was just prior to the TRE's merger with their British Army counterparts to form the Radar Research Establishment in 1953.
Decca's version of the Green Garlic was given the name AMES Type 80 and was among the most powerful radars of its era; the Mark III versions had a detection range against bomber-sized targets of at least 200 nautical miles (370 km; 230 mi) whilst having enough resolution to directly guide interceptor aircraft from its radar displays.
[2] Decca had contacts with the French company SNERI who had developed a radar clutter suppression system.
In addition to the UK market, NATO was undertaking its "high performing reporting post" program which would emerge as the NADGE system.
The MoD then took over funding of further development of the Decca unit to replace the Type 13 as well as the General Electric AN/FPS-6 Radar which were being used in some number.
[2] The first example of the HF200 was completed in 1957 and set up behind Decca's development site on Davis Road in Chessington on the outskirts of London.
[7] The system was designed to work with the Type 80 or similar plan-position indicator (PPI) radars; when an operator on the PPI wanted to measure the altitude of a given blip on their screen, they would press a button as the radar swept by the target, sending the angle of the target to a separate height-finder operator.