 Lt. Britta Christianson of "Ohio"s Gold Crew received her Submarine Supply Corps "dolphins" from the Gold Crew Commanding Officer Capt.Rodney Mills during a brief ceremony at Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS & IMF).On 5 December 2012, three sailors assigned to and became the first female unrestricted line officers to qualify in U.S. submarines.