171010-N-TW634-001 SAN DIEGO (Oct. 10, 2017) The Arleigh Burke-class guided missile destroyer USS John Finn (DDG 113) steams past the floating dry dock Arco (ARDM 5) as Sailors prepare the Los Angeles-class fast attack submarine USS Alexandria (SSN 757) to get underway. Arco is a Submarine Squadron 11 asset, equipped with two wing wall cranes capable of lifting 25 tons each and a ballast pump system able to pump up to 10,000 gallons of water per minute. (U.S. Navy photo by Mass Communication Specialist 1st Class Derek Harkins/Released)