Submarines Submarine Service Recruitment Crisis Surveillance Operations Warships Operations HMS Richmond Shipbuilding Contracts Operational Readiness Russian Navy Astute-class Submarines Eastern Mediterranean Sea Officer Training Officer Cadets Patrol Ships HMS Trent Patrol Vessel Capabilities Roles Ship Collisions Amphibious Assault Ships Trident Missile Aid Delivery Fleet Support Ships HMS Diamond Submarine Operations Training Exercises Submariners Misconduct Frigates Decommissioning