The NORTHPAC 2002 cruise has been a marine mammal assessment survey of the waters of the Bering Sea. The overall objective of the NORTHPAC cruise was to locate, collect data on, and understand the distribution of Northern Right Whales (Eubalaena japonica) which are found in the waters of the study area. Other species studied in the Bering Sea and Northern Gulf of Alaska were humpback whales (Megaptera novaeangliae), fin whales (Balaenoptera physalus) and killer whales (Orcinus orca). In addition, sperm whales (Physeter macrocephalus) were the focus of research on the Leg one. The primary objectives included biopsy sampling, acoustic study and photo-identification. In addition, biological and oceanographic data were collected to better characterize the environment.