Captain Joseph Buzzella, commander, Coast Guard Sector San Diego administers the Oath of Office to Crystal Martens prior to her promotion to chief warrant officer during a ceremony at Sector San Diego on June 30, 2017. Martens was the first female gunner’s mate to be promoted to chief warrant officer in the weapons specialty. (U.S. Coast Guard photo by Petty Officer 3rd Class Joel Guzman/released)