GROTON, Conn. (Oct. 15, 2021) Historic Ship Nautilus (SSN 571) prepares to be moored onboard Naval Submarine Base New London in Groton, Conn., Oct. 15. Nautilus, the world’s first nuclear-powered submarine and current Submarine Force Museum centerpiece, will begin an estimated $36 million preservation project and is expected to be completed in six to eight months. (U.S. Navy photo by Chief Petty Officer Joshua Karsten)