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Line-of-Sight Antitank Missile (LOSAT)

LOSAT is a dedicated antitank weapon system providing a high rate of extremely lethal fire at ranges exceeding tank main gun range, making it capable of defeating any known or projected armor system. The system utilizes a Heavy High Mobility Multipurpose Wheeled Vehicle (HMMWV) heavy chassis, hypervelocity kinetic energy missiles (KEM), a second generation forward-looking infrared (FLIR/TV) acquisition sensor and has a crew of two. The LOSAT System carries four ready missiles via two two-pack containers. LOSAT can operate autonomously or with other systems using its digitized Command and Control capability. Range of the LOSAT missile is greater than 4 km.

The missile accelerates to 5000 feet per second, flies to maximum range in less than four seconds and delivers five times the kinetic energy of current tank rounds. The fire control system allows the gunner/commander to acquire and auto-track up to three targets. Once a launch consent is issued, the system automatically initializes and guides the missiles to the targets in a sequential manner. It is deployable on C-130 through C-5 aircraft including airdrop from the C-130.

The LOSAT program started an Army ACAT I system with oversight by DOT&E. In 1992, analysis by the Army caused the program to be reduced to a Technology Demonstration. The program was upgraded by the JROC to an Advanced Concept Technology Demonstration (ACTD) (4QFY97). Initially, LOSAT was to be mounted on an extended length Bradley Fighting Vehicle. As a Technology Demonstration it was to be mounted on an Armored Gun System (AGS) chassis but when the AGS program was canceled, LOSAT was reconfigured to a HMMWV chassis. Developmental testing has been conducted using the fire control system to direct the kinetic energy missile at tank targets.

Testing at White Sands Missile Range, NM examined the launch effects of the LOSAT on an expanded-capacity HMMWV. Under developmental test conditions, the missile is capable of defeating any known tank it hits. Test firing of the LOSAT missile in a non-tactical configuration on top of a HMMWV has shown all launch effects to fall within the Army's acceptable ranges for human factor limits. Data gathered were extensive both inside and outside of the vehicle. Measurements were made of shock and g-load, on crash test dummies, and flash, toxic gases, pressure, and sound in and outside the vehicle. Numerous operational performance issues must be addressed in future testing either within the ACTD or in subsequent formal OT&E covered by a TEMP.


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