SANTA RITA, Guam (April 27, 2021) Master Chief Machinist’s Mate (Auxiliary) Kevin Swanson, chief of the boat aboard USS Oklahoma City (SSN 723), from Elgin, Illinois, describes the roles and life the a COB of a submarine. Oklahoma City is one of multiple submarines forward-deployed to Commander, Submarine Squadron 15 out of Polaris Point, U.S. Naval Base Guam. (U.S. Navy video by Mass Communication Specialist 2nd Class Kelsey J. Hockenberger)