1971 – Trieste II Submersible – (American)

1971 – Trieste II Submersible with Manipulator Arm. DSV-1 Trieste II When the submarine Thresher was lost on 10 April 1963, a committee established under Admiral Stephan [the Oceanographer of the Navy] to assess the implications of the accident concluded that the Navy did not have the operational assets to conduct missions in the deep sea. The …

1961 – Trieste Submersible with Manipulator – Harold Froehlich (American)

1961 – Trieste Submersible with Manipulator Arm by Harold Froehlich – General Mills. Image source: Manned Submersibles, Frank Bushby, 1976. The Trieste was purchased by the U.S. Navy in 1958. Development of the manipulator arm, instigated by Don Walsh, was done by Harold "Bud" Froehlich of General Mills. Based on the Model 150 arm, it was finally …

1961-4 – Alvin Submersible – Harold Froehlich (American)

1964 – Alvin Submersible by Harold Froehlich – General Mills/Litton Systems. Image source: Manned Submersibles, Frank Bushby, Pub. 1976. In-depth innovation. The first submarine to explore the deep-sea wreckage of the Titanic was designed and built by General Mills. The “Alvin” submarine – named for famous oceanographer Allyn Vine – became the world’s premiere deep-diving research vessel …