27 April 2020 Future USS Frank E Petersen Jr DDG 121 Welcomes First Commanding Officer PENSACOLA, Fla. – Cmdr. Daniel Hancock assumed command of the Pre-Commissioning Unit (PCU), or future USS Frank E. Petersen Jr. (DDG 121) during a ceremony at the National Naval Aviation Museum onboard Naval Air Station Pensacola, Florida, Sept. 27.“Command of a warship carries incredible authority