LeadershipProtectedShips A binary submarine culture By ANI - July 17, 2022 0 728 USS Seawolf during a stop for personnel off the coast of Tromsø, Norway, Aug. 21. By Ryan C. Walker* During my short tenure as a submariner in the U.S. Navy, from 2014-2019, I observed the friendly rivalry between sailors who serve on SSN (fast-attack boats), SSGN (frequently shortened to GN boats), and SSBN (Trident boats). Please Login to view this content. (Not a member? Join Today!)