From RIDGE Events, 5(2):5-7, 11, 1994 Dawn J. Wright Geographic Information Systems for RIDGE Research "In November and December of 1989, the Argo I optical/acoustic seafloor imaging system was used on the Venture III cruise to conduct a near-bottom survey of the narrow (50-200 m wide) axial zone of the East Pacific Rise (EPR) between 9� and 10�N (Haymon et al., 1991). "
From Ridge 2000:http://www.ridge2000.org/science/iss/epr/projects.php : Using the near bottom ARGO imaging system, visually and acoustically surveyed the narrow axial zone of the fast-spreading EPR, discovered the Venture Hydrothermal Fields, and systematically mapped the distribution of hundreds of hydrothermal features relative to other fine-scale volcanic and tectonic features of the ridge crest.