In June 1973, The Johnson Sea Link, a deep-sea submersible, went on a routine mission off the coast of Florida. The Sea Link quickly became entangled in the cables and debris of a sunken ship. Trapped 360 feet below the surface for over 30 hours, four crew members fought for survival, but only two would make it out alive.
Sources:
The Miami News Fri, Jun 22, 1973 ·Page 4
The Orlando Sentinel Sat, Jun 23, 1973 ·Page 4
The Palm Beach Post Sat, Jun 23, 1973 ·Page 4
The Miami Herald Wed, Jun 20, 1973 ·Page 158
The Miami Herald Sat, Jun 23, 1973 ·Page 17
The Miami Herald Fri, Jun 22, 1973 ·Page 22