German submarine U-552 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 1 December 1939 at Blohm & Voss in Hamburg as yard number 528, launched on 14 September 1940, and went into service on 4 December 1940. U-552 was nicknamed the Roter Teufel after her mascot of a grinning devil, which was painted on the conning tower. She was one of the more successful of her class, operating for over three years of continual service and sinking or damaging 35 Allied ships with 164,276 GRT and 1,190 tons sunk and 26,910 GRT damaged. She was a member of 21 wolf packs.
Captain Frederic John Walker, was a British Royal Navy officer noted for his exploits during the Second World War. Walker was the most successful anti-submarine warfare commander during the Battle of the Atlantic, and was known popularly as Johnnie Walker.
Endrass was a "wolfpack" of German U-boats that operated from 12 to 17 June 1942 in attacking Convoy HG 84 that comprised 23 Allied ships. The group's name commemorated the U-boat commander Engelbert Endrass, who was killed in action in December 1941.
SS City of Pretoria was a British cargo steamship. She was torpedoed and sunk in the Second World War with heavy loss of life.
SS City of Venice was an intermediate ocean liner that was launched in 1924 in Northern Ireland for Ellerman Lines. In the Second World War she was a troop ship. In 1943 a U-boat sank her in the Mediterranean, killing 22 of the crew and troops aboard.
HMS Marigold was a Flower-class corvette of the Royal Navy. She was launched on 4 September 1940 and was sunk by an Italian air-dropped torpedo on 9 December 1942.
Convoy HG 76 was an Allied convoy of the HG series, during the Second World War. It was notable for the destruction of five German U-boats, although the true total was not known to the British until after the war.
HMS Fowey was a Shoreham-class sloop of the Royal Navy. She served during the Second World War.
SS Empire Brigade was a 5,184 GRT cargo ship that was built in 1912 as SS Hannington Court. She served through the First World War and was sold in 1936 to Achille Lauro, who renamed her Elios. In 1940 when Italy declared war on France and the United Kingdom she was interned by the UK as a war prize and taken over by the Ministry of War Transport (MoWT), which renamed her Empire Brigade. Four months later she was torpedoed and sunk by U-99.
SS Assyrian was a cargo ship that was built in Hamburg for German owners in 1914, transferred to British owners in 1920 as war reparations and sunk by a U-boat in 1940. She was launched as MS Fritz, and when she changed owners in 1920 she was renamed MS Assyrian. She had been built as a motor ship but in 1925 she was converted to a steamship and became SS Assyrian.
SS British Consul was a tanker built by Sir James Laing & Sons Ltd., Sunderland in 1924 and operated by the British Tanker Company.
MV British Prudence was a tanker built by Sir James Laing & Sons Ltd. of Sunderland in 1939 and operated by the British Tanker Company. A U-boat sank her in 1942 off the coast of Newfoundland. She was a victim of the Second Happy Time: the Kriegsmarine's Operation Drumbeat to sink Allied merchant shipping in the Western Atlantic
36th Escort Group was a British formation of the Royal Navy which saw action during the Second World War, principally in the Battle of the Atlantic. The group operated mainly on the Gibraltar and South Atlantic convoy routes and was involved in several convoy battles, including Convoy HG 76, one of the first Allied victories in the Atlantic campaign.
SS Thurso was a cargo steamship operated by Ellerman's Wilson Line. Thurso was built in 1919 by S. P. Austin & Sons in Sunderland as the War Bramble for the Shipping Controller. Measuring 2,436 gross register tons, the ship had a speed of 9 knots. She was sold to Ellerman Lines while still under construction and remained with the company until lost during the Second World War.
HMS Vetch (K132) was a Flower-class corvette that served in the Royal Navy during the Second World War. After helping to escort many convoys and sinking two U-boats, she was decommissioned and sold in 1945.
HMS Stork (L81) was a Bittern-class sloop of the Royal Navy. She was active during the Second World War, serving in convoy escort groups, and was a successful anti-submarine warfare vessel, being credited with the destruction of four U-boats.
HG 84 was an Allied convoy of the HG series during the Second World War.
OG 82 was an Allied convoy of the OG series during World War II. The action involving this convoy resulted in the destruction of a U-boat, and also had consequences for German U-boat strategy.
HMS Deptford was a Grimsby-class sloop of the British Royal Navy. Built at Chatham Dockyard in the 1930s, Deptford was launched in 1935 and commissioned later that year. The ship saw early service on the Persian Gulf station, but the outbreak of the Second World War saw Deptford serving as a convoy escort in the North Atlantic and the Mediterranean, sinking a German U-boat in 1941. She survived the war and was scrapped in 1948.
HMS Dunvegan Castle was a UK ocean liner that was converted into an armed merchant cruiser (AMC) in the Second World War. Harland and Wolff built her and her sister ship Dunnottar Castle in Belfast in 1936.
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