Dr. Susanne Lockhart and submarine pilot John Hocevar, Director of Oceans for Greenpeace USA, doing a safety check in a submarine onboard Greenpeace ship the Arctic Sunrise, in the Antarctic Sound that connect the Bransfield Strait to the Weddell Sea. Greenpeace is in the Antarctic to conduct submarine-based scientific research to strengthen the proposal to create the largest protected area on the planet, an Antarctic Ocean Sanctuary.