R-class destroyer (1916)

HMS Radstock was the first in a class of 62 R-class destroyers. The design differed from the preceding M-class primarily in the use of geared turbines, which gave better fuel efficiency. The ship was launched in 1916 and served with the Grand Fleet of the Royal Navy during World War I as in an escort and anti-submarine role. While escorting a convoy in 1918, the destroyer collided with the merchant ship Volute, but otherwise had an uneventful war. After the Armistice of 11 November 1918 that ended the war, the vessel was recommissioned with reduced complement and joined the Reserve Fleet. Radstock stayed in Reserve until 1927. By this time, the vessel had deteriorated and, despite having a refit in 1925, was deemed unfit for service and was sold to be broken up.

HMS Raider was the second of a class of sixty two R-class destroyers operated by the Royal Navy. Launched in 1916, the vessel served with the Grand Fleet during World War I. The destroyer was built as part of the preceding M-class but was equipped with geared turbines which improved efficiency and increased range. The ship was involved in anti-submarine patrols, but did not sink any German submarines. After the war, the destroyer initially moved to Harwich and was briefly stationed in Ireland after the Irish Civil War. In 1923, the Navy decided to retire the older destroyers in the fleet and, although initially spared, Raider was decommissioned and sold to be broken up in 1927.

HMS Romola was an R-class destroyer which served with the Royal Navy during World War I. Launched on 14 May 1916, the ship operated as part of the Grand Fleet, operating as part of a destroyer flotilla. The ship sailed to intercept the German High Seas Fleet in what would be one of the last major expeditions of their Navy in the war but saw no action. After the conflict, the destroyer was held in reserve until being retired and sold to be broken up on 13 March 1930.

Clydebank is a town in West Dunbartonshire, Scotland. Situated on the north bank of the River Clyde, it borders the village of Old Kilpatrick to the west, and the Yoker and Drumchapel areas of the adjacent City of Glasgow immediately to the east. Depending on the definition of the town's boundaries, the suburban areas of Duntocher, Faifley and Hardgate either surround Clydebank to the north, or are its northern outskirts, with the Kilpatrick Hills beyond.

HMS Rowena was an R-class destroyer which served with the Royal Navy during World War I. Launched on 1 July 1916, the ship operated as part of the Grand Fleet as part of a destroyer flotilla hunting for German vessels that were attacking convoys in the North Sea. Although there were many reported sightings, no submarines were sunk. After the conflict, the vessel was transferred to the Navy’s establishment at Portland to help in the development of anti-submarine warfare, which ultimately helped in the Battle of the Atlantic. Rowena did not, however, see the fruit of this labour. After twenty years of service, the destroyer was retired and sold to be broken up on 27 January 1937.

HMS Restless was an R-class destroyer which served with the Royal Navy during World War I. Launched on 12 August 1916, the ship operated as part of the Grand Fleet, operating as part of a destroyer flotilla protecting convoys in the North Sea. After the War, the destroyer served in the Mediterranean Sea and was sold to be broken up on 23 November 1936.

HMS Rigorous was an R-class destroyer which served with the Royal Navy during World War I. Launched on 30 September 1916, the vessel operated as part of the Grand Fleet, operating as part of destroyer flotillas hunting German ships that were attacking convoys. One flotilla was successful in destroying a Q ship in 1917. After the War, the destroyer was given a reduced complement and was sold to be broken up on 5 November 1926.

HMS Rocket was an R-class destroyer which served with the Royal Navy during World War I. Launched on 2 July 1916 after being stuck on the slipway since 30 June, the ship joined the Grand Fleet, operating as part of a destroyer flotilla undertaking anti-submarine operations in the North Sea. Although the ship did not successfully engage any German submarines, there was an incident with the Royal Navy boat K7 on 16 June 1917, although that attack was aborted after the erstwhile target was identified as a friendly vessel. After the War, the destroyer served with the anti-submarine and torpedo schools at Portsmouth, and briefly during the Chanak Crisis of 1922, before being sold to be broken up on 16 December 1926.

HMS Rob Roy was a Royal Navy R-class destroyer constructed and then operational in the First World War. The ship served in the Grand Fleet as part of the Fifteenth Destroyer Flotilla.

HMS Redgauntlet was an R-class destroyer which served with the Royal Navy. Launched on 2 July 1916, the ship operated as part of the Harwich Force during World War I and then, after the War, with the Home Fleet. While taking part in an anti-submarine patrol on 21 May 1917, the ship struck a mine but, although severely damaged, was able to return to England for repairs. Subsequently, the destroyer joined the anti-submarine school at Portsmouth before being sold to be broken up on 16 December 1926 after less than ten years service.

HMS Redoubt was an R-class destroyer which served with the Royal Navy during World War I. The R class was an improvement of the preceding M-class, primarily through having geared steam turbines which offered greater efficiency and range. Launched on 28 October 1916, the ship joined the Harwich Force, operating as part of a destroyer flotilla undertaking convoy escort and anti-submarine operations in the North Sea. During 1918, Redoubt took part in an experiment to launch fighter aircraft from a lighter towed beyond a destroyer. The first flight took place on 1 August and the first successful operation ten days later when the Sopwith Camel flew by Lieutenant S.D. Culley took off and destroyed the German airship LZ 100. After the war, the vessel was transferred to the Home Fleet but was sold on 13 July 1926 to be broken up, part of a large scale disposal of older destroyers by the Navy.

HMS Trenchant was a modified Admiralty R-class destroyer which served with the Royal Navy. The vessel was the first of the modified design. Launched in 1916, the ship operated with the Grand Fleet during the First World War. The vessel was involved in escorting convoys and attacking German submarines. After the war, Trenchant was attacked by Republican forces during the Irish War of Independence but suffered little damage. The vessel was retired and sold to be broken up on 15 November 1928. The subsequent S-class are sometimes called Modified Trenchant class.

HMS Tristram was a modified Admiralty R-class destroyer that served in the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched in 1917, the destroyer was operational for just over four years. In 1917, Tristram joined the Grand Fleet and provided distant cover at the Second Battle of Heligoland Bight but did not engage with the enemy. After the armistice which ended the war, the destroyer was initially transferred to the Home Fleet before being placed in reserve in 1920 and then sold to be broken up in 1921.

HMS Tower was a modified R-class destroyer of the Royal Navy, named after the White Tower of the Tower of London. She was built by Swan Hunter, and launched on 5 April 1917. She is noted for having the first modern Royal Navy ship's badge. She served as part of the Grand Fleet and Harwich Force.

HMS Ulster was a modified Admiralty R-class destroyer that served in the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched on 10 October 1917, the vessel served with the Grand Fleet. After the war, the destroyer was placed initially in the Home Fleet, but then moved to the Reserve Fleet before, on 21 April 1928, being sold to be broken up.

HMS Ulysses was a Royal Navy modified R-class destroyer constructed and then operational in the First World War.

HMS Umpire was a modified Admiralty R-class destroyer which served with the Royal Navy. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched on 9 June 1917, the ship operated with the Grand Fleet during World War I as an escort to a squadron of light cruiser and took part in the Second Battle of Heligoland Bight. After the Armistice, the vessel continued to serve and gained fame when, after rescuing the charity's founder from drowning in 1924, the name of the first house opened by what would become Veterans Aid was named H10 after the destroyer's pennant number. Umpire was sold to be broken up in 1930.

HMS Undine was a Modified Admiralty R-class destroyer that served in the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched in 1917, the destroyer served in the Grand Fleet until the end of the war. Undine was sold to be broken up in 1927 but was wrecked on the way to the breakers. The wreck was partially visible in 2013.

HMS Urchin was a Modified Admiralty R-class destroyer which served with the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. The destroyer was the third ship in the Navy to be named after the sea urchin and the first in the class to be built by Palmers in Jarrow. Launched in 1917, Urchin served with the Grand Fleet, seeing action in the Second Battle of Heligoland Bight. After the war, the destroyer was remained in service until being retired and sold to be broken up in 1930.

Palmers Shipbuilding and Iron Company Limited, often referred to simply as "Palmers", was a British shipbuilding company. The Company was based in Jarrow, County Durham, in north-eastern England, and also had operations in Hebburn and Willington Quay on the River Tyne.

HMS Ursa was a modified Admiralty R-class destroyer that served in the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched in 1917, the vessel saw service as part of the Grand Fleet. The destroyer took part in the Second Battle of Heligoland Bight while being commanded by Commander John Tovey, who later became Admiral of the Fleet and led the successful action against the battleship Bismark. The vessel was also one of the first destroyers to launch a torpedo at the enemy during the battle. After the war, Ursa was transferred to the Home Fleet, but was sold to be broken up in 1928.

HMS Ursula was a Modified Admiralty R-class destroyer that served in the Royal Navy. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. The vessel was launched in 1917 at Greenock in Scotland and served with the Grand Fleet during the First World War. After the war, the destroyer was transferred to the Home Fleet, but then moved to the Reserve Fleet. In 1924, Prince George served aboard Ursula before, in 1929, the vessel was sold to be broken up.

HMS Rosalind was an R-class destroyer which served with the Royal Navy. The ship was launched by Thornycroft on 14 October 1916 as the first of five similar ships ordered from the yard. The design was used as the basis for five subsequent ships of the S-class also built by the company. Rosalind served as part of the Grand Fleet during the First World War, operating as an escort to other warships and in anti-submarine patrols alongside other destroyers. The vessel was sold to be broken up on 13 July 1926.

John I. Thornycroft & Company Limited, usually known simply as Thornycroft was a British shipbuilding firm founded by John Isaac Thornycroft in Chiswick in 1866. It moved to Woolston, Southampton, in 1908, merging in 1966 with Vosper & Company to form one organisation called Vosper Thornycroft. From 2002 to 2010 the company acquired several international and US based defence and services companies, and changed name to the VT Group. In 2008 VT's UK shipbuilding and support operations were merged with those of BAE Systems to create BVT Surface Fleet. In 2010 remaining parts of the company were absorbed by Babcock International who retained the UK and international operations, but sold the US based operations to the American Jordan Company, who took the name VT Group.

HMS Radiant was an R-class destroyer which fought in the First World War as part of the Royal Navy before being transferred to the Royal Thai Navy, in which she served until well after the Second World War.

HMS Retriever was a Thornycroft-built R-class destroyer which served with the Royal Navy during the First World War. Launched in 1917, the vessel formed part of the Harwich Force and took part in operations off the coast of Ostend in support of the bombardment of the town in June that year. During August the following year, the vessel attempted to deploy a seaplane from a towed lighter, but a lack of wind meant the operation was unsuccessful. The vessel was also jointly credited with the destruction of the submarine SM UB-54 that year, although this has been disputed. After the war, the ship was placed in reserve and was sold to be broken up in 1927.

HMS Taurus was an R-class destroyer which served with the Royal Navy during World War I. Ordered from Thornycroft in 1915 and launched in 1917, the vessel operated as part of the Harwich Force until the end of hostilities. Shortly after entering service, Taurus formed part of the destroyer shield for the Royal Navy's bombardment of Ostend that successfully sank the German destroyer S20. After the War, the destroyer was reduced to the Reserve Fleet and sold to be broken up in 1930.

HMS Teazer was an R-class destroyer which served with the Royal Navy during World War I. The destroyer was launched in April 1917 and, on trial, proved to be one of the fastest afloat, exceeding 40 knots. Attached to the Harwich Force, the ship supported the monitors Erebus, Terror and Marshal Soult in the bombardment of Zeebrugge in May 1918 and one of the final sorties of the war in the October following. The destroyer also took part in operations off the coast of Heligoland with a flying boat on a lighter, although the aircraft failed to take off. After the war, Teazer was kept in reserve until being sold to be broken up in 1931 following the signing of the London Naval Treaty that limited total destroyer tonnage.

Yarrow Shipbuilders Limited (YSL), often styled as simply Yarrows, was a major shipbuilding firm based in the Scotstoun district of Glasgow on the River Clyde. It is now part of BAE Systems Surface Ships, owned by BAE Systems, which has also operated the nearby Govan shipyard since 1999.

HMS Strongbow was an M-class destroyer built for the British Royal Navy during the First World War. The ship was launched in September 1916 and entered service in November that year. Stongbow was sunk on 17 October 1917 by the German light cruisers SMS Bremse and Brummer in the North Sea, when escorting a convoy of merchant ships from Norway.

The Imperial German Navy or the Imperial Navy was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy, which was mainly for coast defence. Kaiser Wilhelm II greatly expanded the navy. The key leader was Admiral Alfred von Tirpitz, who greatly expanded the size and quality of the navy, while adopting the sea power theories of American strategist Alfred Thayer Mahan. The result was a naval arms race with Britain, as the German navy grew to become one of the greatest maritime forces in the world, second only to the Royal Navy.

SMS Brummer was a minelaying light cruiser of the German Kaiserliche Marine; she was the lead ship of her class. Her sister ship was Bremse. Brummer was laid down at AG Vulcan's shipyard in Stettin, Germany on 24 April 1915 and launched on 11 December 1915 and completed on 2 April 1916. Armed with a main battery of four 15-centimeter (5.9 in) guns in single mounts, she carried 400 mines.

HMS Surprise was a Royal Navy R-class destroyer constructed and then operational in the First World War. She was sunk, with most of her crew in 1917. On 23 December 1917 HMS Surprise, Torrent, and Tornado sank after entering an Imperial German minefield.

HMS Ulleswater was an Yarrow Later M-class destroyer which fought in the First World War as part of the Royal Navy.

U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic-warfare role and enforcing a naval blockade against enemy shipping. The primary targets of the U-boat campaigns in both wars were the merchant convoys bringing supplies from Canada and other parts of the British Empire, and from the United States, to the United Kingdom and to the Soviet Union and the Allied territories in the Mediterranean. German submarines also targeted Brazilian merchant ships during both World Wars and, twice over, precipitated Brazil's decision to give up its neutral stance and declare war on Germany.

The Netherlands, informally Holland, is a country located in northwestern Europe with overseas territories in the Caribbean. It is the largest of four constituent countries of the Kingdom of the Netherlands. The Netherlands consists of twelve provinces; it borders Germany to the east, and Belgium to the south, with a North Sea coastline to the north and west. It shares maritime borders with the United Kingdom, Germany and Belgium in the North Sea. The country's official language is Dutch, with West Frisian as a secondary official language in the province of Friesland. Dutch, English and Papiamento are official in the Caribbean territories.