GROTON, Conn. (Oct. 15, 2021) Line handlers throw mooring lines to the Historic Ship Nautilus (SSN 571) as the ship 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)