US Navy Enlisted Submariners Badge

Enlisted Sailors and Naval Officers wear a dolphins uniform breast pin to indicate that they are qualified in submarines. The Submarines insignia is considered one of the Navy's three major enlisted warfare pins, along with the Surface Warfare Badge and the Enlisted Aviation Warfare Specialist insignia. To earn the right to wear "fish", prospective submariners complete an extensive qualification process that lasts about one year (for both enlisted and officers, though the two programs differ significantly) and covers virtually all of the submarine's systems. Once an enlisted sailor has earned the right to wear the "dolphins", (SS) is added after their rate of rank that stands for "Submarine Specialist"