170308-N-PO203-087 GROTON, Conn. (March 8, 2017) Chief Machinist's Mate (Nuclear) Matt Giffen, left, and Machinist's Mate (Nuclear) 2nd Class Nicholas Lewis, both assigned to the Los Angeles class-attack submarine USS Toledo (SSN 769), help Machinist's Mate (Nuclear) 2nd Class Cameron Sebastian don a prototype submarine steam suit ensemble during an orientation class held at Naval Submarine Base New London. (U.S. Navy photo by John F. Williams/Released)