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.
HMS Express was an E-class minelaying destroyer built for the Royal Navy in the early 1930s. 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.
Operation Wilfred was a British naval operation during the Second World War that involved the mining of the channel between Norway and its offshore islands to prevent the transport of Swedish iron ore through neutral Norwegian waters to be used to sustain the German war effort. The Allies assumed that Wilfred would provoke a German response in Norway and prepared a separate operation known as Plan R 4 to occupy Narvik and other important locations.
USS Aroostook (ID-1256/CM-3/AK-44) was the Eastern Steamship Company's Bunker Hill converted for planting the World War I North Sea Mine Barrage. Bunker Hill was built in 1907 at Philadelphia, Pennsylvania for passenger service between Boston and New York City. Bunker Hill was one of three sister ships, the others being Massachusetts and Old Colony, delivered as passenger/cargo ships by William Cramp & Sons in 1907. They were among the eight ships acquired by the U.S. Navy in November 1917. Bunker Hill and Massachusetts were converted to minelayers at the Boston Navy Yard. Old Colony was used as a district scout until sent across the Atlantic and turned over to the British in 1919.
USS Miantonomah (CM-10/CMc-5) was built as SS Quaker by Pusey & Jones Corporation, Wilmington, Delaware in 1938 as a commercial coastwise ship operating as a fast inland water passenger and freight carrier. Quaker was acquired by the Navy in May 1941 for conversion to a coastal minelayer. Miantonomah operated off the east coast of the United States, Africa and the Mediterranean and took part in the invasion of Europe in 1944. The ship was sunk by a mine 25 September 1944.
HMS Port Napier was a British motor ship that was designed and laid down as a civilian cargo ship but completed in 1940 as an auxiliary minelayer for the Royal Navy. An engine room fire caused an explosion that destroyed her in November 1940. Her remains in Loch Alsh in Scotland are now a recreational wreck diving site.
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.
SS Arabic, originally built as Berlin, was a passenger steamship launched on 7 November 1908 which was built by the AG Weser shipbuilding company in Germany. Her gross register tonnage was advertised at 16,786 tons. She made her maiden voyage on 1 May 1909 from New York to Genoa and Bremerhaven. In September 1914 she became an auxiliary cruiser with the Imperial German Navy as a minelayer.
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.
SS Polar Chief was a merchant steamship that was built in England in 1897 and scrapped in Scotland in 1952. In its 55-year career it had previously been called Montcalm, RFA Crenella, Crenella, Rey Alfonso, Anglo-Norse and Empire Chief. Early in the First World War it spent eight months pretending to be the battleship HMS Audacious.
HNLMS Willem van der Zaan (ML-2/N82/F824/A880) was a minelayer of the Royal Netherlands Navy that was commissioned only days before the start of World War II in September 1939. She served in England, in the Netherlands East Indies, and as a convoy escort in the Indian Ocean before returning to The Netherlands in 1945. She then served again in the Netherlands East Indies and Dutch West Indies until 1950 when she was rebuilt and reclassified as a frigate. From 1961 she was used as an accommodation and repair ship until struck in 1970 and sold for scrap. She was named in honour of the 17th century Schout-bij-nacht Willem Van Der Zaan.
Z16 Friedrich Eckoldt was a Type 1934A-class destroyer built for Nazi Germany's Kriegsmarine in the late 1930s. It was named after Kapitänleutnant Friedrich Eckoldt (1887–1916), the commander of torpedo boat V 48, who was killed when his boat was sunk during the Battle of Jutland on 31 May 1916.
HMS Agamemnon was originally the Blue Funnel Line refrigerated cargo ship Agamemnon. She was built in 1929, traded between the UK 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 Menestheus was originally the Blue Funnel Line refrigerated cargo ship Menestheus. She was built in 1929, and traded between the UK and the Far East. She was an auxiliary minelayer from 1940 to 1943. When the Second World War in 1945, she was undergoing conversion into an amenities ship. She was scrapped in 1953 after being gutted by fire.
HMS Southern Prince was a motor ship that was built in 1929 as the refrigerated cargo ship Southern Prince. She was commissioned into the Royal Navy in 1940 as a minelayer. She became a headquarters ship and then an accommodation ship in 1944, was a fleet training ship in 1945, and returned to civilian trade in 1946. In 1947 she was sold to Italian owners who had her refitted as a passenger ship and renamed her Anna C. From 1952 she was a cruise ship. She was scrapped in 1972.
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.
SS Testbank was a British cargo steamship that was built in England in 1937 and sunk with heavy loss of life in the air raid on Bari in December 1943. She was the first of two Bank Line cargo ships to be called Testbank. The second was a motor ship that was built in 1961, sold and renamed in 1978, and scrapped in 1987.
