This used to be the site of Complex 43, which launched thousands of sounding rockets between 1962 and 1984. In 1984, operations were moved to Complex 47 to allow construction of Complex 46 to support the Navy's Trident II missile efforts. The inaugural launch took place on January 15th of 1987. A total of nineteen Trident IIs were launched from the Complex up until 1989, when sea trials began.
In the mid-1990's, the Complex was redesigned to support commercial launches. Spaceport Florida Authority (a space agency administered by the state of Florida) opened the Complex in 1997, and the first launch took place in 1998. The Complex now supports Lockheed Martin Athena I and Athena II rockets.