Edwin Link spent the following two years designing an unmanned Cabled Observation and Rescue Device (CORD) that could free a trapped submersible. A second "Johnson Sea Link" submersible, nearly identical to the first, was launched in 1975. The two submersibles remained in operation for many years, examining the wreck of the in 1977 and helping recover the wreckage of the Space Shuttle "Challenger" after its destruction in 1986, but were retired in 2011. The 1974 television movie "Trapped Beneath the Sea", starring Lee J. Cobb, was loosely based on the "Johnson Sea Link" accident.