In 1975, a second "Johnson Sea Link" was constructed by the Harbor Branch Oceanographic Institution. In 1977, the JSLs were used to examine the wreckage of the ironclad Civil War battleship, . They were also used in the effort to recover the wreckage of the Space Shuttle "Challenger" after its destruction in 1986. One of the submersibles discovered the solid rocket booster with the faulty seal that had caused the shuttle to explode. The submersible and its research program were featured in a "Voice of America" story in 2005. In 2010, Harbor Branch sold the "Seward Johnson", the ship outfitted to deploy the submersibles, and laid off the submersibles' crew and support staff in July 2011, ending their operation.