Night vision underwater

110420-N-JR159-300 CORONADO, Calif. (April 20, 2011) Participants in Basic Underwater Demolition/SEAL (BUD/s) Class 287 during a night exercise as part of the second phase of their training at Naval Amphibious Base Coronado. Here, two candidates with fully blacked-out dive masks must go underwater and change their equipment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kyle D. Gahlau/Released)