Director of Coral Conservations at the Marine Conservation Biology Institute Dr. Sandra Brooke and Greenpeace Oceans Campaign Director John Hocevar sit in the Dual Deep Worker submarine before descending into the Gulf of Mexico. A team of independent scientists joined the crew of the Arctic Sunrise to conduct a series of scientific research programs that will further the understanding of the impacts of both oil and chemical dispersant on the Gulf ecosystem in the aftermath of the British Petroleum oil spill.