The loss of Tower 4, together with the increasing emphasis on ICBMs as the predominant threat, led a reassessment of the remaining towers. Escape capsules were added to the two remaining towers, allowing rapid evacuation. Shortly thereafter it was decided to close the remaining towers, and the electronic equipment was removed. Both platforms were expected to be returned to shore for scrap, but Tower 2 sank and could not be recovered. Tower 3 was then filled with foam before being knocked off its support, and it was successfully returned to shore and dismantled. The wreckage of Towers 2 and 4 remains in place on the ocean floor. Radar coverage was taken over by alterations to EC-121 airborne early warning flights based out of Otis Air Force Base.
