160901-N-SJ730-010 JAVA SEA (Sept. 1, 2016) Cmdr. Dennis Spence, a nurse anesthetist from San Diego assigned to hospital ship USNS Mercy (T-AH 19), receives the oath of office from his father through video teleconference during his promotion to captain in a ceremony aboard Mercy. Deployed in support of Pacific Partnership 2016, Mercy is sailing to her homeport of San Diego (U.S. Navy Photo by Mass Communication Specialist 2nd Class Hank Gettys/Released)