 The FPS-26A was modified between 1967 and 1970 into the FSS-7 Sea launched ballistic Missile (SLBM) sensor and tracking radar.When the third FPS-24 radome was destroyed in 1968, the FPS-24 was replaced by an FPS-27 search radar with a smaller radar antenna and radome.Connectivity to the SAGE system was through the FST-2B.