A female bottlenose dolphin “BJ” performs her daily exercises while her trainer, Dera Look, supervises at the joint Marine Mammal Research Program on board Marine Corps Base Kaneohe Bay, Hawaii. Professionals and students from the University of Hawaii are studying dolphin hearing and echolocation, the use of sound waves to see. The research will improve the Navy’s mining and sonar techniques and make the oceans safer for marine mammals. U.S. Navy photo by Journalist 2nd Class Jessica B. Davis By Journalist 2nd Class Jessica B. Davis, U.S. Professionals and students from the University of Hawaii (UH) are currently studying dolphin hearing and echolocation - the use of sound waves to "see" - to help the Navy improve mining and sonar techniques and make the oceans safer for marine mammals.