Four seat specialized EW version with AIL/EatonAN/ALQ-99 EW system and J52-P-408 turbojet engines rated at 49,8 kN. The YEA-6B prototype was flown on May 25th, 1968. The NEA-6B is used for tests. Upgrades include the EA-6B EXCAP (Extended Capability), introduced January 1973 with 8 instead of 4 frequency band coverage. EA-6B ICAP-I (Improved Capacity One) was introduced September 1977 and introduced digitally tuned antennae and new cockpit lay-out. EA-6B ICAP-II (Block 86) from 1983 introduced a new AN/AYK-14 mission computer and two-way data-link. 125 were further upgraded to EA-6B ICAP-II Phase 2 (Block 89A) with AN/ARC-310 radio and embedded GPS/INS. EA-6B ADVCAP (Advanced Capability) was a development program initiated to improve the flying qualities of the EA-6B and to upgrade the avionics and electronic warfare systems. Cancelled on cost ground. Final version is the EA-6B ICAP III, also the equipment baseline for the EA-18G Growler. Major improvements are the Northrop Grumman AN/ALQ-218 Radio Frequency Receiver (eliminating the need for triangulation to give a geo-location) and selective jamming capability (allowing pinpoint jamming instead of diffusely jamming a broad spectrum of frequency bands). Latest upgrades include the USQ-113 radio countermeasures set and integration of the Litening targeting pod to counter the improvised explosive devices (IED) in Iraq. This will enable the Prowler to investigate IED activity in support of US ground troops. The last of 170 Prowlers built for the US Navy and US Marine Corps was delivered July 1991.

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