Cymbeline ( radar ) Radar , Field Artillery , No 15 , better known as Cymbeline , was a widely British mortar locating radar operating in the I Band using a Foster scanner . It was developed by Thorn - EMI and was in British service from 1975 until about 2003 with the Royal Artillery . Cymbeline replaced Green Archer in British service , but in a larger number of larger units including the Territorial Army . Cymbeline came in two versions , Mk 1 and Mk 2 , the difference was their mobility , Mk 1 was on a lightweight two wheel trailer and Mk 2 was mounted on top of an FV432 armoured carrier . The Mk 1 was transportable underslung by a helicopter . Cymbeline was more accurate than Green Archer and a lot more mobile . Although mortar locating was its primary role is was capable of various other tasks . Description . The basic Cymbeline was a single unit on a turntable stand with four adjustable legs for levelling . The main elements were the antenna , the Foster scanner , the main electronic unit and a Wankel rotary generator ( using two - stroke fuel ) weighing 390 kg . This was strapped to a simple 590 kg trailer that it could be operated from . Off the trailer the radar was 2 . 29 metres high with the antenna up , 1 . 07 metres with antenna folded , 1 . 7 metres wide and 1 . 5 metres long . The radar itself had a nominal 100 kW peak average output and a nominal pulse repetition frequency of 4000 pulses / second . The radar was connected by cable to the operator ’ s console ( ‘ Indicator Azimuth Unit ’ ) and connected to this was the ‘ Mortar Coordinate Indicator ’ that displayed the located mortar ’ s position to the detachment commander . The Foster scanner converted a narrow radar beam , about 40 mils diameter , into one 720 mils wide and 30 mils high . This beam had five pre - set operating positions determined by five different radar horns that directed the beam onto the antenna at slightly different angles . Two beam positions were used with a mortar bomb being recorded by the operator as it went through each beam . This gave two ranges and elevations , and the time interval . The operator marked his screen at each bomb position and changed the beam angle which also recorded time . He then placed electronic markers against his marks ( which represented the bomb ’ s position in the horizontal plane ) which the analogue computer used to calculate the mortar coordinates using the expected mortar altitude that has been previously set . Setting - up the radar involved orientating it in a known azimuth ( the basic mounting could cover an arc of 4800 mils ) and setting the datum beam elevation between - 90 and 360 mils so that it was above the radar horizon . Other beam positions , 25 , 40 , 45 , 65 and 90 mils were relative to this datum . The lowest beam position was used to alert the operator that a bomb was in flight and where to expect it on his screen , once alerted he tilted the beam into the first position and then into the next . The angles were pre - selected according to the local circumstances . Data memory was also available , although in British service this was normally only fitted to Cymbeline Mk 2 , in essence it recorded the detected mortar bomb signal and allowed it to be replayed . Cymbeline could locate a mortar with an accuracy of 50 metres . 81 mm mortars could be located at up to 10 km and larger mortars to 20 km . Secondary roles were area and coastal surveillance , helicopter and light aircraft control , meteor balloon tracking an rapid survey . It could also observer and adjust ground and airburst artillery fire and high angle fire . In British service each radar held a spare main electronic unit , spare generator and spare displays . The radar includes an integral simulator for operator training and practice and built - in test functionality . Cymbeline Mk 2 was mounted on an FV432 . The normal hatch covers over the rear compartment were replaced by a circular radar mounting , with three ‘ supports ’ for the radar turntable . The radar could be rotated up to 12800 mils . Prototypes used hydraulic supports to level the radar but the production version used mercury in the same manner as Green Archer Mk 2 had . In essence when the taps were opened and the radar unclamped the mercury levelled itself and the radar floated on it . There was some internal furniture for the operator and the displays , as well as racking for the spare assemblies , and a simple hoist to left the assemblies up to the radar . For movement the antenna was lowered and the whole radar surrounded by a folding grill attached to decking around the radar to protect it . British Use . In British service the radars were organised in troops . Originally these were in each field regiment ( equipped with Abbot ) and light regiment ( equipped with L118 Light Gun ) and were designated ' G Troop ' in each regiment . The field regiments had Cymbeline Mk 2 , the light regiments had Cymbeline Mk 1 . In British service a radar troop normally comprised a radar command post , three radars , three Listening Posts ( LPs ) and a reconnaissance party led by the troop sergeant major . Radars and LPs were normally commanded by sergeants . The task of the LPs was to report mortars firing and the area they were in . This told the radar to switch - on , and so avoided continuous transmission as an electronic counter measure . Radars reported the hostile mortar locations to the radar command post , from where they were reported to the Brigade Artillery Intelligence Officer and regimental headquarters for rapid counter - fire . The troop ' s maintenance section , with radar technicians deployed with the radar command post and attended radars as necessary . The troop commander was the Brigade Artillery Intelligence Officer and with the troop ' s artillery intelligence section was at brigade headquarters . However , in the late 1970s some troops were removed from regiments and concentrated into a specialist battery . Operational Use . In British service the radars were used in the Falkland Islands in 1982 , the Gulf War in 1991 and the Balkans . Variants . Thorn - EMI developed a Mk 3 radar during the late 1980s , called Cervantes by the British Army . It made user of modern electronics , had a larger antenna , far greater range , and some capability to locate guns and rocket launchers . However , the development effort was eventually unsuccessful . Other Users . In addition to UK Cymbeline users include : Denmark , Egypt , Finland , Iraq , Kuwait , Malawi , New Zealand , Nigeria , Norway , Oman , Saudi Arabia , Singapore , South Africa and Switzerland . France acquired radars captured in Iraq . In addition Bharat Electronics Ltd produced them under licence for the Indian Army .