200106-N-SB299-1004 SAN DIEGO (Jan. 6, 2020) The Center for Surface Combat Systems (CSCS), Detachment San Diego, hosts Sailors assigned to the guided-missile destroyer USS Paul Hamilton (DDG 60) inside the Navy’s first mobile combat simulator, the On Demand Trainer. The portable Aegis trainer has been delivered to Naval Base San Diego to increase combat lethality across the waterfront. (U.S. Navy photo by Petty Officer 2nd Class Joseph Millar/Released)