The first EA-6B was received by the Navy at NAS Whidbey Island, Washington in January 1971 and deployed to Vietnam in 1972. This "standard version" of the aircraft was replaced in 1973 with the "expanded capability" (EXCAP) EA-6B which augmented the frequency coverage of the ECM system. In 1976 the "improved capability" (ICAP) version entered service. The ICAP II EA-6B was the follow-on and a more sophisticated version. Its first deployment was in 1985. It featured updated operator displays, an inertial navigation system, expanded frequency coverage and a "tactical EA-6B mission support" (TEAMS) system which allows sophisticated pre-flight planning and programming. During Operations Desert Storm and Desert Shield VMAQ-2 had one detachment (six aircraft) deployed in Japan and the remainder of the squadron (12 aircraft) deployed to the Persian Gulf. The Reserve squadron, VMAQ-4 (six aircraft), transitioned from the EA-6A to the EA-6B and subsequently relieved the detachment in Japan. During Desert Shield the squadron flew 936 sorties for over 2100 hours. Marine Prowlers flew 495 combat missions totaling 1622 hours, supporting the full spectrum of joint and combined missions.

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