Disables electronic equipment
The cannon consists of a large device mounted on a turret which concentrates and stores a significant amount of energy in a spherical shell, which it can launch at long distances. It detonates upon impact with a ground unit or land and releases a wave of energy that spreads out linearly from the impact site, creating a circle of moving charge that floods the systems of every vehicle in its path. Most vehicles are reasonably shielded against such effects, and thus no permanent damage is normally done, but the charge still succeeds in disabling them temporarily. The list of affected ordnance includes vehicles, structures, and Cyborgs in its area of effect, including the Cyborg Commando.
After the Firestorm Crisis, the reliability and effectiveness of the EMP have prompted GDI to establish EMP Control Centers in major Yellow Zone cities to allow a trained local militia to buy some time to evacuate, or for GDI reinforcements to arrive.
The EMP has also been developed into weapons: GDI utilizes Shockwave artillery (EMP shells fired from a space platform) and EMP grenades and Nod Marked of Kane Awakened and Enlightened are outfitted with EMP cannons. The normal Nod Raider Buggy can also be outfitted to contain EMP coils, which can charge and release an EMP blast.
The Scrin invaders have found an effective counter to EMP by using the Energy field, which absorbs the pulse but disables the energy shield. The Scrin Annihilator Tripod can also release an EMP blast when close to enemy vehicles and buildings.
EMP cannon acts as a countermeasure to commanders wanting to use rushing tactics early on. The cannon has a range long enough to disable artillery units besieging a base, allowing the defenders to close in and destroy the siege units without coming under fire themselves.