After reaching the sea floor and reading signs and sensors indicating no hydrothermal activity is present, Rich Camilli and Kostas Katsaros “call” scientists on the surface to revise the dive plan. Midway through the dive, the Thetis submersible is joined by the Hellenic Center for Marine Research's ROV Super Achilles to conduct a survey of the site. Image courtesy of Richard Camilli, Project PHAEDRA 2006, WHOI, HCMR, Thera Foundation, NOAA.
