Johnson Sea Link

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Johnson Sea Link was the name of a deep-sea scientific research submersible built by The Harbor Branch Oceanographic Institution in 1971. It was designed by Edwin Albert Link, a friend of Harbor Branch's founder Seward Johnson.

In 1973 the craft was trapped for over 24 hours in the wreckage of the sunken destroyer USS Fred T. Berry. Whilst the craft was eventually recovered by the rescue vessel A. B. Wood, two of the four occupants perished.

In 1975 a second Johnson Sea Link was constructed.

In 1977, JSL I was used as the first vessel to examine the wreckage of the ironclad Civil War battleship, USS Monitor. It was able to recover several main components such as the engine and main turret.