The Improved Launch Control System (ILCS) was a system used by the United States Air Force's Minuteman II ICBM force. ILCS was a method to transfer targeting information from a Minuteman Launch Control Center to an individual missile by communications lines. Prior to ILCS, new missile guidance would have to be physically loaded at the launch facility; the process usually took hours.
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History
ILCS was operational at most Minuteman II wings (except the 44th Missile Wing, which was never upgraded) by the late 1970's. Minuteman III wings had a similar install, designated Command Data Buffer, providing the newer system the potential for remote retarging.
Phaseout
ILCS was phased out in mid-1990s by the retirement of the Minuteman II force, and the inactivation or reapportioning of units to Minuteman III. It was replaced by REACT.