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The Caesar truck-mounted artillery system is a 155mm 52-calibre self-propelled gun developed by Nexter Systems (formerly Giat), based in Versailles, in cooperation with Lohr Industrie of Hangenbieten, France.
The Caesar artillery system evolved from the earlier 155 AM F3 automotive gun, which used the chassis of the AMX-13 light tank.
Caesar is equipped with all the systems needed for independent operation, a cabin to protect the six man gun crew against shell fragments and small arms fire, an initial ammunition supply of 16 complete rounds and instrumentation for navigation, aiming, ballistic calculations and command aids. The system was specifically designed to meet the fire support requirements of rapid deployment forces.
Caesar is equipped with a 155mm, 52-calibre barrel and can maintain a firing rate of six to eight rounds a minute in sustained fire, or three rounds in 15 seconds in rapid fire.
The FAST-Hit computerised fire management system, developed jointly by Nexter and EADS Defense Electronics, an Intertechnique ROB4 muzzle velocity radar system and a SAGEM Sigma 30 navigation system and global positioning system (GPS) are fitted so there is no requirement for topographical teams and goniometers.
The weapon has an automatic hydraulic laying system and the loading system is semi-automatic.
The gun can be set into and out of action in under a minute. The weapon system configuration and the provision of hydraulic drives give a time of approximately 30 seconds to take the Caesar out of battery.
In March 2004, Giat entered an agreement with United Defense (now BAE Systems Land and Armaments) for that company to market Caesar in the USA.
In September 2004, Giat signed a teaming agreement with ADI Ltd of Australia to offer Caesar to the Australian Army for its Land 17 artillery replacement programme.