PNSY Successfully Undocks Cheyenne 2025-02-10 Comments Closed News, RSS KITTERY, Maine — The Los Angeles improved-class attack submarine USS Cheyenne (SSN 773) was successfully undocked Feb. 6, marking a significant milestone in its service life extension program at Portsmouth Naval Shipyard. Related Items Lawmakers advance plans to boost veteran caregiver support 2024-11-19 Sailor in Custody After Body of Missing Norfolk Seaman Found in Wooded Area 2025-06-13 VA secretary emphasizes reforms, accountability for federal workforce 2025-02-24 Expecting mothers overseas now have doula coverage in Tricare test 2025-01-09