Guide to ECM Warfare in Eve Online

Rigs used:
Particle Dispersion Augmentors - increase optimal range of Electronic Warfare modules. This rig has decreased shields as a drawback.

Drones used:
Warrior TP-300 (light)
Vakyrie TP-900 (medium)
Berserker TP-900 (heavy)

Modules used as a countermeasure:
none

How it works:
Increases the signature of the target ship. The result is that target is easier to hit.
Pinning other ships down

Favoured by:
all ships

Modules used:
Warp Jammers - scramble targeted ship and prevent it from warping away.
Webifiers - "web" targeted ship and slow it down significantly

Drones used:
Berserker SW-900 (heavy webifier drone)

Modules used as a countermeasure:
Warp Core Stabilizers

How it works:
Warp Jammers prevent the target ship from warping. It uses a point system meaning that if you use Eve Isk one point of warp scramble strength and the other ship doesn't have any Warp Core Stabilizers to counter this, it will be prevented from warping away as long as it is in range of your Warp Jammer. Webifiers slow down the target ship as long as it is in range.