Boat Mechanic Marc Defournaux holds a tag line as Director of Coral Conservation at the Marine Conservation Biology Institute Dr. Sandra Brooke and Greenpeace Oceans Campaign Director John Hocevar are retrieved from the Gulf of Mexico in the Dual Deep Worker submarine. Greenpeace, partnered with teams of independent scientists, used the MY Arctic Sunrise to investigate the environmental effects of the oil spill and toxic dispersant used to break up the four million barrels of crude oil spilled in the worst environmental disaster in United States history.