 The smoke grenades contain a phosphor compound that masks thermal signature of the vehicle to the enemy.A Vehicle Engine Exhaust Smoke System (VEESS) can also be laid from the engine operated system to visually obscure the area around the vehicle.The electronics package used components designed by Hughes consisting of a 240X4 Forward Looking Infrared Radar (FLIR) day/FLIR stabilized sight with an eye-safe laser range-finder, a Thermal Imaging System (TIS), an onboard digital fire control computer and data bus providing a similar capability as the M1 Abrams Mark 1 Advanced Fire Control System.