The LOSAT Line-Of-Sight Anti-Tank weapon, developed and manufactured by Lockheed Martin Missiles and Fire Control (formerly Lockheed Martin Vought Systems) in Dallas, Texas, consists of the Kinetic Energy Missile (KEM) and an IBAS-based fire control system integrated on an expanded capacity M1114 heavy High-Mobility Multi-purpose Wheeled Vehicle (HMMWV) often referred to as the Humvee.
LOSAT consists of the kinetic energy missile and its IBAS-based fire control system on an expanded HMMWV towing a resupply trailer.
The Kinetic Energy Missile (KEM) is a hit-to-kill weapon, which uses the energy of direct impact to defeat armour and other targets. Instead of an explosive warhead, the missile relies on hypervelocity 5,000ft/s speed to blast a penetrator rod through the heavy multi-plate armour. It reaches maximum range in less than five seconds. The system functions successfully even at high oblique angles of penetration.