hm naval base devonport is the home port of the devonport flotilla which includes the s. in 2009 the ministry of defence announced the conclusion of a long-running review of the long-term role of three naval bases. devonport would no longer be used as a base for attack submarines after these moved to faslane by 2017, and the type 45 destroyers are based at portsmouth. however, devonport retains a long-term role as the dedicated home of the amphibious fleet, survey vessels and half the frigate fleet.