The Royal Naval Reserve is one of the two volunteer reserve forces of the Royal Navy in the United Kingdom. Together with the Royal Marines Reserve, they form the Maritime Reserve. The present RNR was
Members of the Royal Naval Reserve training at Tramore, County Waterford, c. 1905
The crew of HMS Castle Harbour, assigned to the Royal Naval Dockyard in the Imperial fortress colony of Bermuda as the Examination Service vessel (that inspected merchant ships at Five Fathom Hole, under the guns of St. David's Battery - designated the Examination Battery, prior to their entering the shipping channel through Bermuda's reef). Crew members shown included a Royal Naval Reserve officer at left, a Royal Navy officer, regular and temporary ratings,