171010-N-HF252-0042 SAN DIEGO (Oct. 10, 2017) Sailors prepare the Los Angeles-class fast attack submarine USS Alexandria (SSN 757) to get underway from the floating dry dock Arco (ARDM 5). Arco, a Submarine Squadron 11 asset, is 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 Stroop/Released)