|German cruiser Prinz Eugen|
as USS Prinz Eugen, before the atomic bomb tests at Bikini Atoll
|Career (Nazi Germany)|
|Namesake:||Prince Eugene of Savoy|
|Laid down:||23 April 1936|
|Launched:||22 August 1938|
|Commissioned:||1 August 1940|
|Fate:||Towed to Kwajalein Atoll after nuclear weapons test, capsized December 1946|
|Class & type:||Admiral Hipper-class cruiser|
|Length:||207.7 m (681 ft 5 in) overall|
|Beam:||21.7 m (71 ft 2 in)|
|Draft:||Full load: 7.2 m (24 ft)|
|Speed:||32 knots (59 km/h; 37 mph)|
|Aircraft carried:||3 aircraft|
|Aviation facilities:||1 catapult|
Prinz Eugen (German pronunciation: [ˈpʁɪnts ɔʏˈɡeːn]) was an Admiral Hipper-class heavy cruiser, the third member of the class of five vessels. She served with the German Navy (Kriegsmarine) during World War II. The ship was laid down in April 1936 and launched August 1938; Prinz Eugen entered service after the outbreak of war, in August 1940. The ship was named after Prince Eugene of Savoy, an 18th-century Austrian general.
Prinz Eugen saw extensive action during Operation Rheinübung, an attempted breakout into the Atlantic Ocean with the battleship Bismarck in May 1941. The two ships engaged the British battlecruiser Hood and battleship Prince of Wales in the Battle of Denmark Strait, during which Hood was destroyed and Prince of Wales was severely damaged. Prinz Eugen was detached from Bismarck during the operation to raid Allied merchant shipping, but this was cut short due to engine troubles. After putting into occupied France and undergoing repairs, the ship participated in Operation Cerberus, a daring daylight dash through the English Channel back to Germany. In February 1942, Prinz Eugen was deployed to Norway, although her time stationed there was cut short when she was torpedoed by the British submarine Trident days after arriving in Norwegian waters. The torpedo severely damaged the ship's stern, which necessitated repairs in Germany.
Upon returning to active service, the ship spent several months training new officer cadets in the Baltic before serving as artillery support to the retreating German Army on the Eastern Front. After the German collapse in May 1945, the ship was surrendered to the British Royal Navy before being transferred to the US Navy as a war prize. After examining the ship in the United States, the US Navy assigned the cruiser to the Operation Crossroads nuclear tests at Bikini Atoll. After surviving both atomic blasts, Prinz Eugen was towed to Kwajalein Atoll where she ultimately capsized and sank in December 1946. The wreck remains partially visible above the water approximately two miles north-west of Bucholz Army Airfield, on the edge of Enubuj. One of her screws was salvaged and is on display at the Laboe Naval Memorial in Germany.
Prinz Eugen was ordered by the Kriegsmarine from the Germaniawerft shipyard in Kiel. Her keel was laid on 23 April 1936, under construction number 564 and cover name Kreuzer J.  She was originally to be named after Wilhelm von Tegetthoff, the Austrian victor of the Battle of Lissa, though considerations over the possible insult to Italy, defeated by Tegetthoff at Lissa, led to the Kriegsmarine to adopt Prinz Eugen as the ship's namesake. The ship was launched on 22 August 1938, and was completed two years later, on 1 August 1940, the day she was commissioned into the German fleet. As built, the ship had a straight stem, though after her launch this was replaced with a clipper bow. A raked funnel cap was also installed.
Prinz Eugen was 207.7 meters (681 ft) long overall and had a beam of 21.7 m (71 ft) and a maximum draft of 7.2 m (24 ft). The ship had a design displacement of 16,970 t (16,700 long tons; 18,710 short tons) and a full load displacement of 18,750 long tons (19,050 t). Prinz Eugen was powered by three sets of geared steam turbines, which were supplied with steam by twelve ultra-high pressure oil-fired boilers. The ship's top speed was 32 knots (59 km/h; 37 mph), at 132,000 shaft horsepower (98,000 kW). As designed, her standard complement consisted of 42 officers and 1,340 enlisted men.
Prinz Eugen's primary armament was eight 20.3 cm (8.0 in) SK L/60 guns mounted in four twin gun turrets, placed in superfiring pairs forward and aft.[lower-alpha 2] Her anti-aircraft battery was to have consisted of twelve 10.5 cm (4.1 in) L/65 guns, twelve 3.7 cm (1.5 in) guns, and eight 2 cm (0.79 in) guns. The ship also would have carried a pair of triple 53.3 cm (21.0 in) torpedo launchers abreast of the rear superstructure. The ship was to have been equipped with three Arado Ar 196 seaplanes and one catapult. Prinz Eugen's armored belt was 70 to 80 mm (2.8 to 3.1 in) thick; her upper deck was 12 to 30 mm (0.47 to 1.18 in) thick while the main armored deck was 20 to 50 mm (0.79 to 1.97 in) thick. The main battery turrets had 105 mm (4.1 in) thick faces and 70 mm thick sides.
In early July 1940, shortly before her commissioning, Prinz Eugen was attacked by British bombers; the ship was struck by only one bomb. She was not seriously damaged, however, and was commissioned into service the following month. Prinz Eugen spent the remainder of 1940 conducting sea trials in the Baltic Sea. In early 1941, the ship's artillery crews conducted gunnery training. A short period in dry dock for final modifications and improvements followed. In April, the ship joined the newly commissioned battleship Bismarck for maneuvers in the Baltic. The two ships had been selected for Operation Rheinübung, a breakout into the Atlantic to raid Allied commerce.
On 23 April, while passing through the Fehmarn Belt en route to Kiel, Prinz Eugen detonated a magnetic mine dropped by British aircraft. The mine caused serious damage, including a ruptured fuel tank, damaged propeller shaft couplings, and damaged fire control equipment. The planned sortie with Bismarck was delayed while repairs were carried out. Admirals Erich Raeder and Günther Lütjens discussed the possibility of delaying the operation further, in the hopes that repairs to the battleship Scharnhorst would be completed or Bismarck's sistership Tirpitz would complete trials in time for the ships to join Prinz Eugen and Bismarck. Raeder and Lütjens decided that it would be most beneficial to resume surface actions in the Atlantic as soon as possible, however, so the two ships would sortie without reinforcement.
By 11 May, repairs to Prinz Eugen were completed. The ship, under the command of Kapitän zur See Helmuth Brinkmann, steamed to Gotenhafen, where her crew readied the ship for the sortie. On 18 May, Prinz Eugen rendezvoused with Bismarck off Cape Arkona. The two ships were escorted by three destroyers—Hans Lody, Friedrich Eckoldt, and Z23—and a flotilla of minesweepers. The Luftwaffe provided air cover during the voyage out of German waters. At around 13:00 on 20 May, the German flotilla encountered the Swedish cruiser HMS Gotland; the cruiser shadowed the Germans for two hours in the Kattegat. Gotland transmitted a report to naval headquarters, stating: "Two large ships, three destroyers, five escort vessels, and 10–12 aircraft passed Marstrand, course 205°/20'." The OKM was not concerned about the security risk posed by Gotland, though Lütjens believed operational security had been lost. The report eventually made its way to Captain Henry Denham, the British naval attaché to Sweden, who transmitted the information to the Admiralty.
The code-breakers at Bletchley Park confirmed that an Atlantic raid was imminent, as they had decrypted reports that Bismarck and Prinz Eugen had taken on prize crews and requested additional navigational charts from headquarters. A pair of Supermarine Spitfires were ordered to search the Norwegian coast for the German flotilla. On the evening of 20 May, Prinz Eugen and the rest of the flotilla reached the Norwegian coast; the minesweepers were detached and the two raiders and their destroyer escorts continued north. The following morning, radio-intercept officers on board Prinz Eugen picked up a signal ordering British reconnaissance aircraft to search for two battleships and three destroyers northbound off the Norwegian coast. At 7:00 on the 21st, the Germans spotted four unidentified aircraft, though they quickly departed. Shortly after 12:00, the flotilla reached Bergen and anchored at Grimstadfjord. While there, the ships' crews painted over the Baltic camouflage with the standard "outboard gray" worn by German warships operating in the Atlantic.
While in Bergen, Prinz Eugen took on 764 t (752 long tons; 842 short tons) of fuel; Bismarck inexplicably failed to similarly refuel. At 19:30 on 21 May, Prinz Eugen, Bismarck, and the three escorting destroyers left port. By midnight, the force was in the open sea and headed toward the Arctic Ocean. At this time, Admiral Raeder finally informed Hitler of the operation, who reluctantly allowed it to continue as planned. The three escorting destroyers were detached at 04:14 on 22 May, while the force steamed off Trondheim. At around 12:00, Lütjens ordered his two ships to turn toward the Denmark Strait to attempt the breakout into the open waters of the Atlantic.
By 04:00 on 23 May, Lütjens ordered Prinz Eugen and Bismarck to increase speed to 27 kn (50 km/h; 31 mph) to make the dash through the Denmark Strait. Upon entering the Strait, both ships activated their FuMo radar detection equipment sets. Bismarck led Prinz Eugen by about 700 m (2,300 ft); mist reduced visibility to 3,000 to 4,000 m (9,800 to 13,100 ft). The Germans encountered some ice at around 10:00, which necessitated a reduction in speed to 24 kn (44 km/h; 28 mph). Two hours later, the pair had reached a point north of Iceland. The ships were forced to zigzag to avoid ice floes. At 19:22, hydrophone and radar operators aboard the German warships detected the cruiser HMS Suffolk at a range of approximately 12,500 m (41,000 ft). Prinz Eugen's radio-intercept team decrypted the radio signals being sent by Suffolk and learned that their location had indeed been reported.
Admiral Lütjens gave permission for Prinz Eugen to engage Suffolk, though the captain of the German cruiser could not clearly make out his target and so held his ship's fire. Suffolk quickly retreated to a safe distance and shadowed the German ships. At 20:30, the heavy cruiser HMS Norfolk joined Suffolk, but approached the German raiders too closely. Lütjens ordered his ships to engage the British cruiser; Bismarck fired five salvoes, three of which straddled Norfolk and rained shell splinters on her decks. The cruiser laid a smoke screen and fled into a fog bank, ending the brief engagement. The concussion from the 38 cm guns firing disabled Bismarck's FuMo 23 radar set; this prompted Lütjens to order Prinz Eugen to take station ahead so she could use her functioning radar to scout for the formation.
The cruisers remained in their stations through the night, continually relaying the location and bearing of the German ships. The harsh weather broke on the morning of 24 May, revealing a clear sky. At 05:07 that morning, hydrophone operators aboard Prinz Eugen detected a pair of unidentified vessels approaching the German formation at a range of 20 nmi (37 km; 23 mi), reporting "Noise of two fast-moving turbine ships at 280° relative bearing!". At 05:45, lookouts on the German ships spotted smoke on the horizon; these turned out to be from Hood and Prince of Wales, under the command of Vice Admiral Lancelot Holland. Lütjens ordered his ships' crews to battle stations. By 05:52, the range had fallen to 26,000 m (85,000 ft) and Hood opened fire, followed by Prince of Wales a minute later. Hood engaged Prinz Eugen, which the British thought to be Bismarck, while Prince of Wales fired on Bismarck.[lower-alpha 3]
The British ships approached the German ships head on, which permitted them to use only their forward guns, while Bismarck and Prinz Eugen could fire full broadsides. Several minutes after opening fire, Holland ordered a 20° turn to port, which would allow his ships to engage with their rear gun turrets. Both German ships concentrated their fire on Hood; about a minute after opening fire, Prinz Eugen scored a hit with a high-explosive 20.3 cm (8.0 in) shell; the explosion detonated Unrotated Projectile ammunition and started a large fire, which was quickly extinguished. Holland then ordered a second 20° turn to port, to bring his ships on a parallel course with Bismarck and Prinz Eugen. By this time, Bismarck had found the range to Hood, so Lütjens ordered Prinz Eugen to shift fire and target Prince of Wales to keep both of his opponents under fire. Within a few minutes, Prinz Eugen scored a pair of hits on the battleship and reported a small fire to have been started.
Lütjens then ordered Prinz Eugen to drop behind Bismarck, so she could continue to monitor the location of Norfolk and Suffolk, which were still some 10 to 12 nmi (19 to 22 km; 12 to 14 mi) to the east. At 06:00, Hood was completing the second turn to port when Bismarck's fifth salvo hit. Two of the shells landed short, striking the water close to the ship, but at least one of the 38 cm armour-piercing shells struck Hood and penetrated her thin deck armor. The shell reached Hood's rear ammunition magazine and detonated 112 t (110 long tons; 123 short tons) of cordite propellant. The massive explosion broke the back of the ship between the main mast and the rear funnel; the forward section continued to move forward briefly before the in-rushing water caused the bow to rise into the air at a steep angle. The stern similarly rose upward as water rushed into the ripped-open compartments. In only eight minutes of firing, Hood had disappeared, taking all but three of her crew of 1,419 men with her.
After a few more minutes fighting, during which Prince of Wales scored three hits on Bismarck, the battered British battleship withdrew. The Germans ceased fire as the range widened, though Captain Ernst Lindemann, Bismarck's commander, strongly advocated chasing Prince of Wales and destroying her. Lütjens firmly rejected the request, and instead ordered Bismarck and Prinz Eugen to head for the open waters of the North Atlantic. After the end of the engagement, Lütjens reported that a "Battlecruiser, probably Hood, sunk. Another battleship, King George V or Renown, turned away damaged. Two heavy cruisers maintain contact." At 08:01, he transmitted a damage report and his intentions to OKM, which were to detach Prinz Eugen for commerce raiding and to make for St. Nazaire for repairs. Shortly after 10:00, Lütjens ordered Prinz Eugen to fall behind Bismarck to discern the severity of the oil leakage from the bow hit. After confirming that "broad streams of oil on both sides of [Bismarck's] wake", Prinz Eugen returned to the forward position.
With the weather worsening, Lütjens attempted to detach Prinz Eugen at 16:40. The squall was not heavy enough to cover her withdrawal from Wake-Walker's cruisers, which continued to maintain radar contact. Prinz Eugen was therefore recalled temporarily. The cruiser was successfully detached at 18:14. Bismarck turned around to face the Wake-Walker's formation, forcing Suffolk to turn away at high speed. Prince of Wales fired twelve salvos at Bismarck, which responded with nine salvos, none of which hit. The action diverted British attention and permitted Prinz Eugen to slip away.
On 26 May, Prinz Eugen rendezvoused with the supply ship Spichern to refill her nearly-empty fuel tanks. The ship had suffered serious defects in her propulsion system, which necessitated a return to occupied France for repairs. On 31 May, the ship was joined by an escort of destroyers off the coast of France; The following day, she put into Brest. Repairs lasted for the next eight months, during which Prinz Eugen and the other German warships in the area were repeatedly attacked by Allied bombers. On the night of 1–2 July, the ship was struck by bombs that killed or injured over 100 men.
Prinz Eugen and the battleships Scharnhorst and Gneisenau were continually threatened by Allied air attacks while stationed in Brest, so Adolf Hitler ordered their return to Germany in early 1942. The intention was to deploy the vessels to Norway to interdict Allied convoys to the Soviet Union. Hitler insisted they would make the voyage via the English Channel, despite the protests of Raeder. Vice Admiral Otto Ciliax was given command of the operation. In early February, minesweepers swept a route through the English Channel, though the British failed to detect the activity.
At 23:00 on 11 February, Scharnhorst, Gneisenau, and Prinz Eugen left Brest. They entered the Channel an hour later; the three ships sped at 27 kn (50 km/h; 31 mph), hugging the French coast along the voyage. By 06:30, they had passed Cherbourg, at which point they were joined by a flotilla of torpedo boats. The torpedo boats were led by Kapitän Erich Bey, aboard the destroyer Z29. General der Jagdflieger (General of Fighter Force) Adolf Galland directed Luftwaffe fighter and bomber forces (Operation Donnerkeil) during Cerberus. The fighters flew at masthead-height to avoid detection by the British radar network. Liaison officers were present on all three ships. German aircraft arrived later to jam British radar with chaff. By 13:00, the ships had cleared the Strait of Dover, though half an hour later, a flight of six Swordfish torpedo bombers, with Spitfire escort, attacked the Germans. The British failed to penetrate the Luftwaffe fighter shield, and all six Swordfish were destroyed.
Off Dover, Prinz Eugen came under fire from British coastal artillery batteries, though they scored no hits. Several Motor Torpedo Boats then attacked the ship, but Prinz Eugen's destroyer escorts drove the vessels off before they could launch their torpedoes. At 16:43, Prinz Eugen encountered five British destroyers: Campbell, Vivacious, Mackay, Whitshed, and Worcester. She fired her main battery at them and scored several hits on Worcester, but she was forced to maneuver erratically to avoid their torpedoes. Nevertheless, Prinz Eugen arrived in Brunsbüttel on the morning of 13 February, completely undamaged.
On 21 February 1942, Prinz Eugen, the heavy cruiser Admiral Scheer, and the destroyers Richard Beitzen, Paul Jakobi, Z25, Hermann Schoemann, and Friedrich Ihn steamed to Norway. After stopping briefly in Grimstadfjord, the ships proceeded on to Trondheim. Two days later, while patrolling off the Trondheimsfjord, the British submarine Trident torpedoed Prinz Eugen. The torpedo struck the ship in the stern, causing serious damage and rendering the ship unmaneuverable. She was towed to Lofjord, where, over the span of the next few months, emergency repairs were effected. Her entire stern was cut away and plated over and two jury-rigged rudders, operated manually via capstans, were installed.
On 16 May, Prinz Eugen made the return voyage to Germany under her own power. While en route to Kiel, the ship was attacked by a British force of 19 bombers and 27 torpedo bombers, though they failed to hit the ship. Prinz Eugen was out of service for repairs until October; she conducted sea trials beginning on 27 October. Over the next two months, the ship was occupied with lengthy trials in the Baltic. In early January 1943, the Kriegsmarine ordered the ship to return to Norway to reinforce the warships stationed there. Twice in January Prinz Eugen attempted to steam to Norway with Scharnhorst, but both attempts were broken off after British surveillance aircraft spotted the two ships. After it became apparent that it would be impossible to move the ship to Norway, Prinz Eugen was assigned to the Fleet Training Squadron. For nine months, she cruised the Baltic training new cadets.
As the Soviet Army pushed the Wehrmacht back on the Eastern Front, it became necessary to reactivate Prinz Eugen as a gunnery support vessel. Therefore, on 1 October 1943, the ship was reassigned to combat duty. In June 1944, Prinz Eugen, the heavy cruiser Lützow, and the 6th Destroyer Flotilla formed the Second Task Force, later renamed the Thiele Task Force. Prinz Eugen was at this time steaming in the eastern Baltic, northwest of the island of Utö. On 19–20 August, the ship steamed into the Gulf of Riga and bombarded Tukums. Four destroyers supported the action, along with Prinz Eugen's Ar 196 floatplanes. Prinz Eugen's bombardment was instrumental in the successful repulse of the Soviet attack.
In early September, Prinz Eugen supported a failed attempt to seize the fortress island of Hogland. The ship then returned to Gotenhafen, before escorting a convoy of ships evacuating German soldiers from Finland. The convoy, consisting of six freighters, sailed on 15 September from the Gulf of Bothnia, with the entire Second Task Force escorting it. Swedish aircraft and destroyers shadowed the convoy, but did not intervene. The following month, Prinz Eugen returned to gunfire support duties. On 11 and 12 October, the ship fired in support of German troops in Memel. Over the first two days, the ship fired some 700 rounds of ammunition from her main battery. She returned on the 14th and 15th, after having restocked her main battery ammunition, to fire another 370 rounds.
While on the return voyage to Gotenhafen on 15 October, Prinz Eugen inadvertently rammed the light cruiser Leipzig amidships north of Hela. The collision occurred due to heavy fog. The light cruiser was nearly cut in half, and the two ships remained wedged together for fourteen hours. Prinz Eugen was taken to Gotenhafen where repairs were effected in the span of a month. On 20–21 November, the ship supported German troops on the Sworbe Peninsula by firing around 500 rounds of main battery ammunition. She then returned to Gotenhafen to resupply and have her worn out gun barrels re-bored.
The ship was ready for action by mid-January 1945, when she was sent to bombard Soviet forces in Samland. The ship fired over 870 rounds of ammunition at Soviet forces in Cranz advancing on Königsberg. At that point, Prinz Eugen had expended her main battery ammunition, but critical munition shortages forced the ship to remain in port until March, when she bombarded Soviet forces around Gotenhafen, Danzig, and Hela. The following month, on 8 April, Prinz Eugen and Lützow steamed to Swinemünde. On 13 April, 34 Lancaster bombers attacked the two ships while in port. Thick cloud cover forced the British to abort the mission and return two days later. On the second attack, they succeeded in sinking Lützow with a single Tallboy bomb hit. Prinz Eugen then departed Swinemünde for Copenhagen, arriving on 20 April. Once there, she was decommissioned on 7 May and turned over to Royal Navy control the following day.
On 27 May 1945, Prinz Eugen and the light cruiser Nürnberg were escorted by the British cruisers Dido and Devonshire to Wilhelmshaven. On 13 December, the ship was awarded as a war prize to the United States, which sent the ship to Wesermünde. The cruiser was commissioned into the U.S. Navy as the unclassified miscellaneous vessel USS Prinz Eugen (IX-300). A composite American-German crew, under the command of Captain A. H. Graubart, then took the ship to Boston, departing on 13 January 1946 and arriving on 22 January. There, the ship was extensively examined by the US Navy. Her very large GHG passive sonar array was removed and installed on the submarine USS Flying Fish for testing. American interest in magnetic amplifier technology increased again after findings in investigations of the fire control system of Prinz Eugen.
The ship was then allocated to the fleet of target ships for Operation Crossroads in Bikini Atoll. Prinz Eugen was towed to the Pacific via Philadelphia and the Panama Canal. The ship survived two atomic bomb blasts, Test Able, on 1 July 1946, and Test Baker on 25 July. Prinz Eugen was thoroughly contaminated with radioactive fallout, but suffered no structural damage from the explosions. The irradiated ship was towed to the Kwajalein Atoll in the central Pacific, where a small leak went unrepaired. On 29 August 1946, the US Navy decommissioned Prinz Eugen.
By late December 1946, the ship was in very bad condition; on the 21st, the ship began to list severely. A salvage team could not be brought to Kwajalein in time, so the US Navy attempted to beach the ship to prevent her from sinking, but on 22 December, Prinz Eugen capsized and sank. Her main battery gun turrets fell out of their barbettes when the ship rolled over. The ship's stern, including her propeller assemblies, remain visible above the surface of the water. The US Government denied salvage rights, on the grounds that it did not want the irradiated steel entering the market. In August 1979, one of the ship's screws was retrieved and placed in the Laboe Naval Memorial in Germany.
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- ↑ 1.0 1.1 1.2 1.3 Gröner, p. 65.
- ↑ 2.0 2.1 Williamson, p. 37.
- ↑ Schmalenbach, pp. 121–122.
- ↑ 4.0 4.1 Gröner, p. 67.
- ↑ Williamson, p. 35.
- ↑ 6.0 6.1 Gröner, p. 66.
- ↑ 7.0 7.1 7.2 Schmalenbach, p. 140.
- ↑ Williamson, pp. 37–38.
- ↑ 9.0 9.1 9.2 9.3 Williamson, p. 38.
- ↑ von Müllenheim-Rechberg, p. 60.
- ↑ von Müllenheim-Rechberg, p. 76.
- ↑ 12.0 12.1 Garzke & Dulin, p. 214.
- ↑ 13.0 13.1 Bercuson & Herwig, p. 65.
- ↑ Bercuson & Herwig, pp. 66–67.
- ↑ Bercuson & Herwig, p. 68.
- ↑ Zetterling & Tamelander, p. 114.
- ↑ von Müllenheim-Rechberg, p. 83.
- ↑ Bercuson & Herwig, p. 71.
- ↑ Bercuson & Herwig, p. 72.
- ↑ Garzke & Dulin, p. 215.
- ↑ 21.0 21.1 Garzke & Dulin, p. 216.
- ↑ Bercuson & Herwig, p. 126.
- ↑ Bercuson & Herwig, pp. 126–127.
- ↑ Bercuson & Herwig, p. 127.
- ↑ Bercuson & Herwig, pp. 129–130.
- ↑ Bercuson & Herwig, pp. 133–134.
- ↑ Garzke & Dulin, pp. 219–220.
- ↑ Garzke & Dulin, p. 220.
- ↑ Bercuson & Herwig, pp. 151–153.
- ↑ Bercuson & Herwig, p. 153.
- ↑ Bercuson & Herwig, pp. 155–156.
- ↑ Garzke & Dulin, p. 223.
- ↑ Bercuson & Herwig, pp. 162–165.
- ↑ Bercuson & Herwig, pp. 165–166.
- ↑ Bercuson & Herwig, p. 167.
- ↑ Bercuson & Herwig, p. 168.
- ↑ 37.0 37.1 Bercuson & Herwig, p. 173.
- ↑ Zetterling & Tamelander, pp. 192–193.
- ↑ Garzke & Dulin, p. 227.
- ↑ 40.0 40.1 40.2 Schmalenbach, p. 141.
- ↑ 41.0 41.1 41.2 Williamson, p. 39.
- ↑ Williamson, pp. 39–40.
- ↑ 43.0 43.1 43.2 43.3 Garzke & Dulin, p. 146.
- ↑ 44.0 44.1 44.2 Williamson, p. 40.
- ↑ Hooton, pp. 114–115.
- ↑ Hooton, p. 114.
- ↑ Weal, p. 17.
- ↑ 48.0 48.1 48.2 Schmalenbach, p. 142.
- ↑ Rohwer, p. 146.
- ↑ 50.0 50.1 50.2 50.3 50.4 50.5 50.6 50.7 50.8 Williamson, p. 41.
- ↑ 51.0 51.1 51.2 51.3 51.4 51.5 51.6 Schmalenbach, p. 143.
- ↑ Rohwer, p. 351.
- ↑ Rohwer, p. 363.
- ↑ Williamson, p. 41–42.
- ↑ 55.0 55.1 55.2 Williamson, p. 42.
- ↑ Rohwer, p. 409.
- ↑ 57.0 57.1 57.2 57.3 "Prinz Eugen". Naval History & Heritage Command. http://www.history.navy.mil/danfs/p12/prinz_eugen.htm. Retrieved 27 July 2011.
- ↑ Friedman, p. 62.
- ↑ Geyger, William A. (1957) . "Historical Development of Magnetic-amplifier Circuits". Magnetic-Amplifier Circuits (2nd ed.). New York, New York: McGraw-Hill Book Company. p. 11. Library of Congress Catalog Card Number 56-12532. "One reason for the increased interest in magnetic amplifiers in this country was the successful German development work for various military applications, especially for naval fire-control systems, as used on the German heavy cruiser "Prinz Eugen.""
- ↑ Black, A. O. (November 1948). "Effect of Core Material on Magnetic Amplifier Design". pp. 427–435.
- ↑ 61.0 61.1 61.2 61.3 Gardiner & Chesneau, p. 229.
- ↑ 62.0 62.1 Lenihan, p. 200.
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