Center for Whale Research

Active sonar is the Navy’s best weapon to detect the presence of hostile submarines. But that same powerful underwater pulse of sound can harm or even kill whales and other marine mammals. Now, the Navy is seeking permission to continue using a huge swath of the Northwest coast – from northern California to the Canadian border -- for a wide range of naval training and practice, including sonar. The Navy says it’s taking precautions, but others say it’s not enough.