ALVIN 785 Dive 785 5. The runtime for this video is 32m 45s. Alvin dive 785 took place on August 31, 1977 during voyage LU-94. The Chief Scientist was W. Ryan in the operating area of Oceanographers Canyon. The HOV reached a depth of 785 meters. The purpose was described as 'GEOLOGY' and the sponsor as 'J.A.', or Joint Agreement of National Science Foundation, Office of Naval Research, and National Oceanic and Atmospheric Administration.