OPERATION DEEPSTAR-A RECORD OF RESEARCH OPERATIONS WITH THE DEEP SUBMERSIBLE (JULY-OCTOBER 1967).

This report gives an account of the use of the deep submergence research vehicle Deepstar 4000 by the U. S. Navy Underwater Sound Laboratory during the period 1 July to 23 October 1967. The report has been divided into two major sections an overview of the planning and operation of the program, and a general summary of the research conducted during the operation. Operation Deepstar consisted of 53 scientific research dives conducted along a 2500-mile track from the Gulf of Mexico to south of Newfoundland. Research dives were made to obtain data concerning 1 surface, bottom, and volume reverberation, 2 the biological composition of the deep scattering layer, 3 detailed physical features of the ocean bottom, 4 ambient electromagnetic noise in the sea, 5 ambient acoustic noise, and 6 the applicability of DRVs for target strength measurements. Author