HMS Ivanhoe was an I-class destroyer built for the Royal Navy in the mid-1930s. During the Spanish Civil War of 1936–1939, the ship enforced the arms blockade imposed by Britain and France on both sides as part of the Mediterranean Fleet. Before the start of World War II, the ship was modified so that she could be used to lay mines by removing some of her armament. Ivanhoe was transferred to Western Approaches Command shortly after the war began and helped to sink one German submarine in October 1939. She was converted to a minelayer while undergoing a refit in November–December and laid minefields in German coastal waters as well as anti-submarine minefields off the British coast until she was reconverted back to her destroyer configuration in February 1940. Ivanhoe reverted to her minelaying role during the Norwegian Campaign in April 1940 and then laid a number of minefields off the Dutch coast during the Battle of the Netherlands in May. The ship participated in the Dunkirk evacuation until she was badly damaged by German aircraft on 1 June. On her first minelaying mission after her repairs were completed, she struck a German mine and had to be scuttled on 1 September 1940 during the Texel Disaster.
The British L-class submarine was originally planned under the emergency war programme as an improved version of the British E-class submarine. The scale of change allowed the L class to become a separate class.
HMS L52 was a late-model L-class submarine built for the Royal Navy during the First World War. The boat was not completed before the end of the war and was sold for scrap in 1935.
HMS L53 was a late-model L-class submarine built for the Royal Navy during the First World War. The boat was not completed before the end of the war and was sold for scrap in 1939.
HMS Porpoise (N14) was one of the six-ship class of Grampus-class mine-laying submarines of the Royal Navy. She was built at Vickers Armstrong, Barrow and launched 30 August 1932. She served in World War II in most of the naval theatres of the war, in home waters, the Mediterranean and the Far East. She was sunk with all hands by Japanese aircraft on 19 January 1945, and was the last Royal Navy submarine to be lost to enemy action.
HMS L11 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1932.
HMS L12 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1932.
HMS L14 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1934.
HMS L17 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1934.
HMS L25 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1935.
HMS Boadicea was the lead ship of her class of scout cruisers built for the Royal Navy in the first decade of the 20th century. She led the 1st Destroyer Flotilla from completion until the ship was transferred to the 3rd Destroyer Flotilla in mid-1912. A year later Boadicea was reassigned to the 2nd Battle Squadron and she spent the bulk of World War I with that squadron. The ship was present at, but did not fight in, the Battle of Jutland in mid-1916. Boadicea was converted into a minelayer at the end of 1917 and made three sorties to lay her mines before the end of the war. She was placed in reserve after the war and taken out of service in 1920. The ship was used for harbour service at Dartmouth until she was sold for scrap in 1926.
HMS Esk was an E-class destroyer built for the Royal Navy in the early 1930s. She was designed to be easily converted into a fast minelayer by removing some guns and her torpedo tubes. Although assigned to the Home Fleet upon completion, the ship was attached to the Mediterranean Fleet in 1935–36, during the Abyssinia Crisis. During the Spanish Civil War of 1936–1939, she spent considerable time in Spanish waters, enforcing the arms blockade imposed by Britain and France on both sides of the conflict. Esk was converted to a minelayer when World War II began in September 1939, and spent most of her time laying mines. During the Norwegian Campaign of April–June 1940, the ship laid mines in Norwegian territorial waters before the Germans invaded, but was recalled to home waters to resume her minelaying duties in early May. During one such sortie, Esk was sunk during the Texel Disaster on the night of 31 August 1940, when she ran into a newly laid German minefield.
HMS Port Quebec was a British motor ship that was designed and launched in 1939 to be the refrigerated cargo ship Port Quebec, but completed in 1940 as an auxuiliary minelayer. In 1944 she was converted into an aircraft component repair ship and renamed HMS Deer Sound. In 1947 she was returned to her owner, Port Line, and completed as a cargo ship. She was scrapped in Taiwan in 1968.
HMS Apollo was an Abdiel-class minelayer of the Royal Navy, the eighth RN ship to carry the name. She served with the Home Fleet during World War II, taking part in the Normandy Landings before being transferred to the British Pacific Fleet. Put into reserve in 1946, she was recommissioned in 1951, serving until 1961, and was sold for scrapping in 1962.
The Yugoslav minelayer Zmaj was built in Weimar Germany for the Royal Yugoslav Navy in the late 1920s. She was built as a seaplane tender, but does not appear to have been much used in that role and was converted to a minelayer in 1937. Shortly before the Axis invasion of Yugoslavia in April 1941 during the Second World War, she laid minefields along the Dalmatian coast, perhaps inadvertently leading to the sinking of two Yugoslav passenger ships. Slightly damaged by Italian dive bombers and then captured by the Italians during the invasion, she was soon handed over to the Germans. While in their service the ship was renamed Drache, had her anti-aircraft (AA) armament improved, and was used as a seaplane tender and later as a troop transport. In the latter role she participated in over a dozen convoys between the Greek port of Piraeus and the Greek island of Crete between December 1941 and March 1942.
HMS Agamemnon was originally the Blue Funnel Line refrigerated cargo ship Agamemnon. She was built in 1929, traded between the United Kingdom and the Far East, and was scrapped in 1963. During the Second World War she was converted into an auxiliary minelayer in 1940, and then into an amenities ship in 1943.
HMS Abdiel was a Marksman-class flotilla leader of the Royal Navy, built by Cammell Laird during the First World War. She was converted to a minelayer during construction, commissioning during 1916, and served at the Battle of Jutland. Following the end of the war, Abdiel served in the Baltic during the Russian Civil War. She was sold for scrap in 1936.
HMS Tarpon was a Royal Navy R-class destroyer constructed and operational in the First World War. She is named after the large fish Tarpon; one species of which is native to the Atlantic, and the other to the Indo-Pacific Oceans. Tarpon was built by the shipbuilders John Brown & Company at their Clydebank shipyard and was launched in March 1917 and entered service in April that year.
HMS Telemachus was a R-class destroyer of the British Royal Navy that took part in the First World War. She was built in 1916–1917 by the Scottish shipbuilder John Brown at their Clydebank shipyard. Telemachus was modified to serve as a minelayer, laying minefields in the German Bight and English Channel to restrict the operation of German submarines. The ship survived the war and was sold for scrap in 1927.
HMS Princess Margaret was a minelayer operated by the British Royal Navy during and after the First World War. She was built by the Scottish shipbuilder William Denny for the Canadian Pacific Railway as a liner to serve on the Pacific West Coast, and as such was powered by geared steam turbines, giving a speed of 23 knots.
United Kingdom
