PASSIVE INFRARED VOIED ARMED BY RC
One of the most common influence VOIEDs, and the one that the MA sector has probably experienced the most, is the passive infrared (PIR) VOIED.
RC armed PIR VOIED
Image 13. RC armed PIR VOIED camouflaged as a rock located in rubble at a road junction
In this particular example, the PIR VOIED incorporates an RC switch as a safe-to-arm device. This means that the route can remain open to the armed group that emplaced the IED, until a target is present. Even if this target is using a jammer to protect itself from an RCIED, this device can be armed using RC prior to the jammer being effective. When the target vehicle then passes, it influences the PIR causing an output. Additional circuitry is used to step up this output to the required level in order to function the detonator.
RC antenna
RC receiver
PIR sensor
Rock camouflage
Expanding foam
EFP main charge and booster
Image 14. Cross-section of an RC armed PIR VOIED
In this example all the IED components have been contained inside expanding foam, which has then been camouflaged to look like a rock, in keeping with the environment in which it has been emplaced. Only the antenna of the RC protruding from the foam and a hole for the PIR sensor are visible. The main charge in this example is an explosively formed projectile (EFP).
IED tactics
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