Active protection system

Countermeasures that either conceal the vehicle from, or disrupt the guidance of an incoming guided missile threat are designated soft-kill active protection measures.

Countermeasures that physically strike an incoming threat to damage or destroy it and thereby limit its ability to penetrate armor are designated hard-kill active protection measures.

Some systems use laser dazzlers to blind the operator or sensors of semi-automatic command to line of sight (SACLOS) anti-tank guided missiles (ATGMs), such as the JD-3 of the Type 99 tank.

Another American system, known as Iron Curtain, utilizes two sensors to reduce false alarms and defeat threats inches from their target by firing a kinetic countermeasure designed to minimize collateral damage.

The Russian Afganit active protection system of the Armata AFVs features a millimeter-wavelength radar to detect and track incoming anti-tank munitions.

Arena Active Protection System :
1. Protective siloes
2. Radar
3. Protective ammo
4. Incoming anti-tank guided missile
5. Tracking phase
Merkava Mk IVm Windbreaker, fitted with Trophy APS
American Quick Kill system takes out an RPG in a test October 2007