This film illustrates U.S. Naval Electronics Laboratory scientists using oceanographic research tools such as scuba diving, the NEL Oceanographic Tower off Mission Beach, the bathyscaphe TRIESTE, a thermistor chain towed behind a ship, and model wave tanks. The focus of the film is NEL work with Denise, the Cousteau Soucoupe Sous-Marine submersible, which NEL used for over twenty one dives for a year from 1964-1965. Eugene C. LaFond studied physical oceanography and the sea bottom west of the NEL Oceanographic Tower off Mission Beach California. Edwin Buffington examined sea gullies and took core samples offshore San Clemente, California. David G. Moore observed a submarine canyon in the Coronado Bank off the coast of Baja California, Mexico and rock outcrops in Thirty-Mile Bank off California. Robert F. Dill studied the La Jolla submarine canyon of California and the San Lucas and Los Frailes canyons at the tip of Baja California, Mexico. Eric G. Barham observed the mid-water phenomena known as Deep Scattering Layer.
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