The Blue crew of the ballistic-missile submarine USS Henry M. Jackson (SSBN 730) transits the Hood Canal as it returns home to Naval Base Kitsap-Bangor following a routine strategic deterrent patrol on Sept. 30, 2015. US Navy photo.
Enlisted Naval Submarine Service Device. Earned after rigorous training and testing. Indicating that a sailor is submarine qualified. When a sailor says, "I earned my Dolphins," know that he has trained harder than he has for anything else in his life.