Panzer II variants the Pz.Kpfw. IIJ, it was redesigned after the Panzer V Panther, most noticeably with the introduction of fully sloped frontal armor. Two versions were initially planned, a lighter, faster 18-ton variant and a slower, 26-ton vehicle; the former was abandoned at an early stage. Subsequently, work on the first prototype was abandoned when it was determined that the vehicle was underarmed for its weight, and versions of the Panzer IV and V could serve just as well in the reconnaissance role while being more capable of defending themselves. This vehicle never received an official Panzerkampfwagen title, but it would have
AI Mk. VIII radar of the set without the pilot's indicator was sent for testing to the FIU in Mosquito "HK946" in December 1943, and returned some time later with an extensive list of upgrade suggestions. The idea of windscreen projection had been attempted with the AI Mk. IV as the Mk. V, but a number of problems had been found and it was not adopted for service. Several updated versions were used in trials, but by 1943 the Mk. V radar was obsolete, and the "Pilot's Indicator Display" (PID) was instead adapted to the Mk. VIII. This time the system's output was not