Note
There was a need for a lightweight hydrocrane to handle launching and recovery of the Harbor Branch Foundation submersible, JOHNSON-SEA-LINK. Aluminum, because of its high strength to weight ratio, weldability, high corrosion resistance and low maintenance became the prime candidate for this application, all of which led Edwin A. Link, Trustee and Vice President of Harbor Branch Foundation, Inc. to request the assistance of ALCOA in the design of a suitable unit.