ALVIN 685 Dive 685 August 17, 1976. The runtime for this video is 32m 46s. Alvin dive 685 took place on August 17, 1976 during voyage LU-88. The Chief Scientist was H. Jannasch in the operating area of Continental Slope. The HOV reached a depth of 685 meters. The purpose was described as 'BIOLOGY' and the sponsor as 'J.A.', or Joint Agreement of National Science Foundation, Office of Naval Research, and National Oceanic and Atmospheric Administration.