171004-N-LK932-0013 NORFOLK (Oct. 4, 2017) Chief of the Boat Melvin O. Walker, assigned to the Pre-Commissioning Unit (PCU) Washington (SSN 787), instructs reporters on how to properly board the submarine. Washington is the U.S. Navy’s 14th Virginia-class attack submarine and the fourth U.S. Navy ship named for the state of Washington. (U.S. Navy photo by Mass Communication Specialist Seaman Patrick T. Bauer/Released)