WS-2400 8x8 cross country truck. However, the PHL-03 and BM-30 do not share interchangeable parts, so they are distinct missiles despite their similar appearance. The Chinese vehicle utilizes a German-designed diesel engine, transmission and hydraulics, manufactured by Wanshan in China, following a technology transfer from ZF Friedrichshafen. The program actually begun in the late 1990s, with the '96' in the designation reportedly meaning 1996, the year that the Chinese military first issued the requirement for a new long range SPMRLS. The program went through major redesign changes when the BM-30 Smerch was purchased. Although dubbed by many Chinese as a guided self-propelled multiple rocket launching system (SPMRLS), the PHL96 is not strictly speaking a guided SPMRLS because, technically, none of rockets are guided – the guidance is actually achieved via the sub-munitions, such as the 9M55K1 cluster munition. Only a very limited number of the PHL96 entered Chinese service because its successor, the PHL03, entered service shortly after. A-100 – A 300 mm, 10-tube multiple rocket launcher developed by the Beijing-based China Academy of Launch Vehicle Technology (CALT) in the late 1990s. The A-100 has a minimum firing range of 40 km & a maximum firing range of 100 km. PHL-03 – Chinese development of the PHL96 with 150 km range. The PHL03 is a highly digitized PHL96 with a computerized fire control system (FCS) incorporating GPS/GLONASS, similar to that of the Type 90A SPMRL, with a four-man crew (compared with three for the BM-30/PHL96), which entered service around 2004–2005, only a year or two after its predecessor, the PHL96. As with the PHL96, the PHL03 is not exactly a guided SPMRL because it is the submunitions that are guided, not the rockets themselves. – Chinese development of the PHL03. This is actually the first model of the Chinese versions of the BM-30 SPMRL that is a truly a guided rocket system, in that the rockets themselves are guided by the simple primitive cascade inertial terminal guidance used on the WS series SPMRL, which became standard for later Chinese versions. Russia had already developed a guided version of the BM-30 with mid-course radio command guidance to immediately correct the error in the flight of the rocket once detected by the ballistic tracking radar, but this was not adopted due to financial constraints. – Chinese development of the AR-1. A 10-round version of the AR-1, with two launching boxes, each containing