GROTON, Conn. (Sept. 27, 2021) Cmdr. Adam Zaker, prospective commanding officer of the Virginia-class submarine USS South Dakota (SSN 790), arrives as part of the official party during a change-of-command ceremony onboard Naval Submarine Base New London in Groton, Conn. South Dakota and crew operate under Submarine Squadron (SUBRON) FOUR and its primary mission is to provide fast-attack submarines that are ready, willing, and able to meet the unique challenges of undersea combat and deployed operations in unforgiving environments across the globe. (U.S. Navy photo by Chief Mass Communication Specialist Joshua Karsten)