Continuous constabulary presence differs from the sharper signal of deterrence. Modern River-class offshore patrol vessels and interwar sloops show how numerous small ships can sustain that low-level presence. Sloop once covered a broad general-purpose category, whereas frigate had become associated with anti-submarine warfare by the end of the Second World War. Choosing frigate for the postwar fleet communicated the mission the Royal Navy expected those ships to perform.
Notable Point · 48:42-50:05
Sloops, frigates, and constabulary naval presence
Small ships can maintain routine presence, while the Royal Navy’s shift from the term sloop to frigate reflected the growing importance of anti-submarine warfare after 1945.