Sue Rocca, a marine biologist from the Whale and Dolphin Conservation Society and Greenpeace crew ride in an inflatable boat heading out to use a hydrophone to listen to marine mammals 150 miles (241 km) west of the BP Deepwater Horizon oil spill site in the Gulf of Mexico. She is on board a small rhib launched from the Greenpeace ship MY Arctic Sunrise. The three-month Greenpeace ship expedition was launched to support independent research into the impacts of the Gulf oil disaster on marine life, as well as researching the unique environments and marine life that are at risk.