Astute-Class: The Royal Navy Has Submarines as Quiet as Dolphin
Each of the Royal Navy's nuclear-powered Astute-class fleet submarines (SSNs) has been outfitted with many technological firsts, including not having an optical periscope.
Barrow In Furness United Kingdom George Anson Royal Navy Astute Royal Navy True Attack Subs For The Royal Navy
Source: nationalinterest.org