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IABS - RPG Active Countermeasure
combines an inexpensive radar sensor and airbag systems which are
inflated before the RPG hits the protected vehicle. The airbag
disrupts the shaped charge fuse, as the projectile collapses upon
itself, jamming the time-out fuse, thus defusing the shaped charge
before it hits the vehicle's skin.
tests, the system was installed on up-armored Humvees doors, and
demonstrated effective protection of the crew compartment. IABS
was also effective in protecting the transparent armor (windows)
which were broken, but were not penetrated by the RPG.
Countering the RPG
Threat Warning Devices