HMS Erebus was a First World War monitor launched on 19 June 1916 and which served in both world wars. She and her sister ship Terror are known as the Erebus class. They were named after the two bomb vessels sent to investigate the Northwest Passage as part of Franklin's lost expedition (1845–1848), in which all 129 members eventually perished.
The M29 class comprised five monitors of the Royal Navy, all built and launched during 1915.
HMS Gorgon and her sister ship Glatton were two monitors originally built as coastal defence ships for the Royal Norwegian Navy, as HNoMS Nidaros and Bjørgvin respectively, by Armstrong Whitworth at Elswick. She was purchased from Norway at the beginning of the First World War, but was not completed until 1918 although she had been launched over three years earlier. She engaged targets in Occupied Flanders for the last several months of the war and fired the last shots of the war against such targets on 15 October 1918. She was used as a target ship after several attempts to sell her had fallen through before being sold for scrap in 1928.
The Abercrombie class of monitors served in the Royal Navy during the First World War.
HMS Terror was an Erebus-class monitor built for the Royal Navy during the First World War in Belfast. Completed in 1916, she was assigned to the Dover Patrol where her primary duties involved bombarding German targets on the coast of occupied Belgium, particularly at the ports of Zeebrugge and Ostend. In October 1917 Terror was hit by three torpedoes, taking severe damage to the bow, and had to be towed into Portsmouth for repair. In April 1918 she participated in the Zeebrugge raid and provided gunnery support for the Fifth Battle of Ypres in September of the same year.
The Erebus class of warships was a class of 20th century Royal Navy monitors armed with a main battery of two 15-inch /42 Mk 1 guns in a single turret. It consisted of two vessels, Erebus and Terror, named after the two ships lost in the Franklin Expedition. Both were launched in 1916 and saw active service in World War I off the Belgian coast. After being placed in reserve between the wars, they served in World War II, with Terror being lost in 1941 and Erebus surviving to be scrapped in 1946.
The Lord Clive-class monitor, sometimes referred to as the General Wolfe class, were ships designed for shore bombardment and were constructed for the Royal Navy during the First World War.
The Marshal Ney class was a class of monitor built for the Royal Navy during the First World War.
The Roberts class of monitors of the Royal Navy consisted of two heavily gunned vessels built during the Second World War. They were the Roberts, completed in 1941, and Abercrombie, completed in 1943.
HMS Prince Eugene was one of eight Lord Clive-class monitors built for the Royal Navy in 1915 to conduct shore bombardments during the First World War. The ship was assigned to the Dover Patrol for the duration of the war and provided cover for the Inshore Squadron during the First Ostend Raid. She was sold for scrap in 1921.
HMS General Craufurd was the one of eight Lord Clive-class monitors built for the Royal Navy during World War I. Their primary armament was taken from obsolete pre-dreadnought battleships. The ship spent the war in the English Channel bombarding German positions along the Belgian coast as part of the Dover Patrol. She participated in the failed First and Second Ostend Raids in 1918, bombarding the defending coastal artillery as the British attempted to block the Bruges–Ostend Canal. Later that year General Craufurd supported the coastal battles during the Hundred Days Offensive until the Germans evacuated coastal Belgium in mid-October. The ship was decommissioned almost immediately after the war ended the following month, but she was reactivated in 1920 to serve as a gunnery training ship for a year. General Craufurd was sold for scrap in 1921.
HMS Lord Clive was the lead ship of her class of eight monitors built for the Royal Navy during World War I. Their primary armament was taken from obsolete pre-dreadnought battleships. The ship spent the war in the English Channel bombarding German positions along the Belgian coast as part of the Dover Patrol, often serving as a flagship. She participated in the failed First Ostend Raid in 1918, bombarding the defending coastal artillery as the British attempted to block the Bruges–Ostend Canal. Lord Clive was one of two ships in the class fitted with a single 18-inch (457 mm) gun in 1918, but she only fired four rounds from it in combat before the end of the war in November. The ship conducted gunnery trials after the war and was sold for scrap in 1927.
HMS Marshal Soult was a Royal Navy Marshal Ney-class monitor constructed in the opening years of the First World War. Laid down as M14, she was named after the French general of the Napoleonic Wars Marshal Nicolas Jean de Dieu Soult. She served in both World Wars and was decommissioned in 1946.
HMS General Wolfe, also known as Wolfe, was a Lord Clive-class monitor which was built in 1915 for shore-bombardment duties in the First World War. Her class of eight ships was armed by four obsolete Majestic-class pre-dreadnoughts which had their 12-inch guns and mounts removed, modified and installed in the newly built monitors. Wolfe spent her entire war service with the Dover Patrol, bombarding the German-occupied Belgian coastline, which had been heavily fortified. In the spring of 1918 she was fitted with an 18-inch (457 mm) gun, with which she made the longest-range firing in the history of the Royal Navy - 36,000-yard (20 mi) - on a target at Snaeskerke, Belgium. After the war, she was laid up before being stripped and put up for sale in 1920. She was finally scrapped in 1923.
HMS Sir John Moore was one of eight Lord Clive-class monitors built for the Royal Navy in 1915 to conduct shore bombardments during the First World War. The ship was assigned to the Dover Patrol for the duration of the war and was sold for scrap in 1921.
The Humber-class monitors were three large gunboats under construction for the Brazilian Navy in Britain in 1913. Designed for service on the Amazon River, the ships were of shallow draft and heavy armament and were ideally suited to inshore, riverine and coastal work but unsuitable for service at sea, where their weight and light draft reduced their speed from a projected twelve knots to under four. The class comprised Humber, Mersey and Severn. All three were taken over by the Royal Navy shortly before the outbreak of the First World War and were commissioned as small monitors. All three saw extensive service during the war and were sold in 1919.
HMS Glatton and her sister ship Gorgon were originally built as coastal defence ships for the Royal Norwegian Navy, as Bjørgvin and Nidaros respectively. She was requisitioned from Norway at the beginning of World War I, but was not completed until 1918 although she had been launched over three years earlier. On 16 September 1918, before she had even gone into action, she suffered a large fire in one of her 6-inch magazines, and had to be scuttled to prevent an explosion of her main magazines that would have devastated Dover. Her wreck was partially salvaged in 1926, and moved into a position in the northeastern end of the harbour where it would not obstruct traffic. It was subsequently buried by landfill underneath the current car ferry terminal.
HMS Humber was a Humber-class monitor of the Royal Navy. Originally built by Vickers for Brazil as Javary, she was purchased by the Royal Navy in 1914 on the outbreak of the First World War along with her sister ships Severn and Mersey.
The M15 class comprised fourteen monitors of the Royal Navy, all built and launched during 1915.
HMS M21 was a First World War Royal Navy M15-class monitor. After service in the Mediterranean and the Dover Patrol, she struck a mine off Ostend in January 1918 and sank off Dover.
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