AN/ALQ-218 EW Receiver Suite (ICAP III EA-6B Upgrade)
ICAP III is the latest of five generations of EA-6 airborne electronic-attack systems designed to identify, degrade and destroy enemy radar-guided air defense and communication systems. At the heart of the ICAP III Prowler are the new ALQ-218 receiver and the sophisticated algorithms that allow selective-reactive jamming and threat precision geolocation capabilities. ICAP III also has the new Multifunction Information Distribution System (MIDS). MIDS, which features the U.S. military's primary data-link system, LINK 16, will enable ICAP III Prowlers to become key nodes in the Navy's Sea Power 21 FORCEnet architecture.
To date, Northrop Grumman has delivered two lots of Prowlers modified with the new ICAP III system to the Navy. These aircraft have been deployed several times to support combat operations in Iraq and Afghanistan. 
Drawing upon advanced hardware and software technologies, the ALQ-218 represents state of the art precision passive radar threat detection, identification, precision geolocation, and jammer control.
ICAP III is also the basis for the system Northrop Grumman is producing for the EA-18G Growler, which will replace the U.S. Navy's Prowlers beginning next year. Northrop Grumman is now building upon the ICAP III technology to develop future airborne electronic attack systems.