German World War II submarine
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 &amp; 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" ("Red Devil") 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.
"U-552" was involved in two controversial actions: On 31 October 1941, she sank the , the first US Navy warship to be lost in World War II; this was at a time when the US was still officially neutral, and caused a diplomatic dispute. On 3 April 1942, she sank the freighter "David H. Atwater" off the US seaboard.
"U-552" had an unusually long service life, surviving to the end of World War II; after evacuating from her French base during the spring of 1944, she operated on training duties in the Baltic Sea until she was decommissioned in February 1945. On 5 May 1945, she was scuttled in Helgoland Bight, to prevent her falling into enemy hands.
Design.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. "U-552" had a displacement of when at the surface and while submerged. She had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder, supercharged diesel engines producing a total of for use while surfaced, and two Brown, Boveri &amp; Cie GG UB 720/8 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to .
The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . "U-552" was fitted with five torpedo tubes (four fitted at the bow and one at the stern), 14 torpedoes, one SK C/35 naval gun, 220 rounds, and a C/30 antiaircraft gun. The boat had a complement between 44 and 60.
Service history.
Initial voyage to Helgoland.
Following construction, which was completed on 4 December 1940, "U-552" was given two months of working-up training, during which she prepared her crew and equipment for the operations ahead. She then sailed from Kiel on 13 February to Helgoland for her first official patrol, arriving there on 18 February 1941. This port city was to remain "U-552"'s home base until she was transferred to the occupied French port of St Nazaire in mid-March 1941.
First patrol.
"U-552"'s first official war patrol began on 18 February 1941, when she left Helgoland for a patrol in the North Sea and the North Atlantic south of Iceland. This first operation yielded one British tanker and one Icelandic trawler carrying fish. The British tanker "Cadillac" was sunk just north of Scotland on 1 March, while the trawler was sunk just south of Iceland on 10 March. Following these victories, "U-552" headed back to St Nazaire. The remainder of her later patrols were all conducted from the French city, which gave her easy access to the Atlantic Ocean and allowed her more time at sea.
Second patrol.
"U-552" began her second war patrol on 7 April 1941, when she left her new home port of St Nazaire for the North Atlantic. The "U-552" arrived in her assigned patrol area south-west of Iceland on 11 April. No targets were engaged until 26 April when at 18:09 GMT, the "U-552" was midway between Iceland and northern Scotland. Topp sighted “s"moke cloud bearing 10°T"” from a small “"patrol vessel size"” target. The target was followed “"at the limit of visibility"” while waiting for nightfall. At 00:10 (27 April), about 130 nautical miles SE of Iceland, the small vessel "Commander Horton" was attacked. The U-552 log records “"Fishing trawler (patrol vessel) sunk with 82 shots of 8.8 cm and 102 shots MG C30.  No resistance.”" ("Commander Horton", 227 tones, 14 casualties).
Around 11:00 GMT on 27 April, the "U-552" was submerged and “"Propeller sounds heard bearing 200°T"”. Topp then commenced a surface pursuit of a large steamer. “"Estimate enemy speed 16 knots.  Am gaining only as a result of the zig zags."” At 14:12, at grid position AL3236, the "Beacon Grange" was in the targeting range of 1000 meters. The submerged U-552 fired a fan of three torpedoes. All three torpedoes hit the ship. A few minutes later while the crew were launching lifeboats, the U-552 surfaced and “"ran in for a coup de grace”."  A fourth torpedo was fired and the U-boat log records “"Hit aft 20 meters." … "Steamer breaks completely in the center, deck awash, ends continue to float.”" ("Beacon Grange", 10,119 tones, 2 casualties)
During the afternoon of 28 April 1941, a historic battle was underway about 180 miles south of Iceland. A wolf pack “"Rudeltaktik"” of five U-boats had launched the war's first submerged daylight attack on a convoy. The submerged U-boats, which were spread out over a distance of about 10 miles, intercepted and attacked an east-bound convoy. The "U-123" (Karl-Heinz Moehle), had spotted Convoy HX-121 and called in "U-65" (Joachim Hoppe), "U-95" (Gerd Schreiber), "U-96" (Heinrich Lehmann-Willenbrock), and "U-552" (Erich Topp) for the kill. "U-552" started things off at 14:15 GMT (60°06’N 20°18’W), when it torpedoed the British tanker "Capulet". Nine casualties resulted, and the tanker was abandoned, but did not sink. At 17:25, three more ships were sunk by "U-96" with one spread of three torpedoes: British tanker "Oilfield" (47 casualties, 8 survivors); Norwegian tanker "Caledonia" (12 casualties, 25 survivors); and British freighter "Port Hardy" (one casualty). "U-65" was sunk by HMS "Douglas" in a depth-charge attack, and all 50 men in the crew perished.
After torpedoing the tanker "Capulet", "U-552" was depth charged in five separate attacks from destroyers HMS "Maori" and HMS "Inglefield", forcing the submarine to remain submerged for hours until the convoy was out of range. The "U-552" had been damaged and this would be a troubled day, with attacks from air and sea as it neared the convoy, swift dives, and gingerly resurfacing. After diving and hearing nothing at 01:45 on the 30th, Erich Topp realized that Convoy HX-121 must have changed course to the north. His convoy pursuit was broken off and his boat came to a southerly course. At 02:18 GMT, Topp sent a message to B.d.U. (Admiral Dönitz): “S"ank: “Beacon Grange”, a patrol vessel. From convoy tanker 8000 tons. Return Transit via North Channel." [My position] "AM2477".” In his log, Topp recorded “"Intention: As long as fuel allows, position in North Channel".”
On 30 April, the surfaced "U-552" was about 150 nautical miles west of the North Channel entrance … and searching for targets. At 21:40 GMT, Topp sighted a ship, the troopship "S.S. Nerissa" approaching from the north-west. For almost 2 hours, Topp stalked the zigzagging "Nerissa" and adjusted his torpedo firing solution accordingly. Finally, Topp saw a phosphorescent glow on the sea and decided that 1,000 metres was as close as he should approach his target, and he fired a fan of three torpedoes. The "U-552" log records that one of the three torpedoes “"hit astern"” at 00:27 Berlin Time (GMT+2). About 6 minutes later, Topp closed in on the already stricken ship and fired a fourth torpedo as a "coup de grace" into "Nerissa's" aft starboard side while her crew and passengers were launching lifeboats. More than half of the 207 casualties were Canadians. ("SS Nerissa", 5,583 tones, casualties 207)  
The "U-552" had four remaining torpedoes and she continued searching for merchant ships in transit towards the North Channel. Topp was not successful in engaging any additional targets and almost 48 hours after sinking the "SS Nerissa", the "U-552" commenced her homeward transit south. She arrived in St Nazaire on 6 May.  
Third patrol.
"U-552" left St Nazaire for her third war patrol on 25 May 1941. In 39 days, she travelled into the North Atlantic and sank three British vessels: the "Ainderby" on 10 June, the "Chinese Prince" on 12 June, and the "Norfolk" on 18 June. During the attack on the "Norfolk", "U-552" attempted to attack the remaining ships in the convoy, but was forced to break off the attack due to the arrival of several of the convoy's escorts. All of these attacks occurred off the northwest coast of Ireland, and once "U-552" returned to St. Nazaire on 2 July 1941, she had amassed a total of 24,401 GRT from the ships she had sunk.
Fourth patrol.
"U-552"'s fourth patrol was much less successful than her previous three. Having left St Nazaire on 18 August, she proceeded to head south into the waters off Portugal and Spain. Here, she sank the Norwegian vessel, "Spind". Following this sinking, "U-552" returned to St Nazaire on 26 August 1941, after only 9 days at sea.
Fifth and sixth patrols.
Her next two patrols all took her further into the Atlantic, where the danger was lessened, but so were the targets, with the result that she only hit three more cargo ships. Also this time, during her final patrol of 1941, she sank the "Reuben James", which was torpedoed on 30 October in controversial circumstances.
Sinking of USS "Reuben James".
On 31 October 1941, USS "Reuben James" was one of five destroyers escorting convoy HX-156, close to the coast of Iceland, about west of the island. "Reuben James" had just begun turning to investigate a strong direction-finder bearing when a torpedo launched from "U-552" struck her port side and caused an explosion in her forward magazine. The entire bow section of the destroyer was blown off as far back as the fourth funnel and sank immediately. The stern remained afloat for around five minutes before sinking; unsecured depth charges compounded the damage, exploding as they sank and killing survivors in the water. Of her 160-man crew, 115 were killed, including all the officers.
The destroyer was the first US Navy warship to be sunk in World War II.
The incident provoked a furious outburst in the United States, especially when Germany refused to apologize, instead countering that the destroyer was operating in what Germany considered to be a war zone and had suffered the consequences. The sinking of the "Reuben James" did not lead the US to declare war on Germany; it did, however, provide a pretext to officially transfer the US Coast Guard from its peacetime role as an arm of the US Treasury Department to a wartime function as part of the US Navy. Congress also amended the Neutrality Act to permit the arming of US-registered merchant ships and authorized them to enter European waters for the first time since 1939.
Second Happy Time.
In 1942, again commanded by Erich Topp (who later became an admiral in the postwar Bundesmarine), "U-552" participated in the "Second Happy Time" (Operation "Drumbeat" or "Paukenschlag"), during which German submarines had great success against unescorted American merchantmen sailing alone along the eastern seaboard of the US. "U-552" was particularly successful during this period, sinking 13 ships and damaging another in just three patrols in the first six months of 1942. Two further patrols under Topp during the summer netted four more ships. However, in an attack against Convoy ON-155 on 3 August 1942, the boat was nearly sunk when she was caught on the surface by the Canadian corvette . The corvette machine-gunned the submarine and hit the conning tower with a four-inch shell, causing severe damage and forcing Topp to return to base for repairs. "U-552" was badly damaged by heavy seas during another patrol and was put into port for repairs, during which Topp was promoted and replaced by a more cautious commander, Klaus Popp.
Sinking of the "David H. Atwater".
The destruction of the , in the Atlantic Ocean off Chincoteague, Virginia, was one of the more controversial actions of the Kriegsmarine during the Second World War, primarily due to the manner of the sinking.
On the night of 2 April 1942, at