The U.S. Navy's EC-130Q Hercules TACAMO ("Take Charge And Move Out") aircraft was a land-based naval aviation platform that served as a SIOP strategic communications link aircraft for the U.S. Navy's Fleet Ballistic Missile (FBM) submarine force and as a backup communications link for the USAF manned strategic bomber and intercontinental ballistic missile forces. To ensure survivability, TACAMO operated as a solo platform, well away from and not interacting with other major naval forces such as sea-based aircraft carrier strike groups and their carrier air wings or land-based maritime patrol aircraft. Operated by Fleet Air Reconnaissance Squadron THREE (VQ-3) and Fleet Air Reconnaissance Squadron FOUR (VQ-4), the EC-130Q was replaced by the U.S. Navy's current TACAMO platform, the Boeing 707-based E-6 Mercury.