Ultimately, the Kaiser and the Navy Department won the debate, and the battlecruiser for the 1909–1910 building year would continue in the pattern of the previous Von der Tann and Moltke-class designs. Beatty presumed that the German cruisers were the advance screen for Hipper's ships, but the battlecruisers were some 50 km (27 nmi) ahead. Many of the war-weary sailors felt the operation would disrupt the peace process and prolong the war. The main belt was reinforced by a torpedo bulkhead that was 50 mm (2 in) thick. A 50 mm belt of sloping armor was placed under the main deck armor.
 The exact details of the plan were unknown, and it was assumed that the High Seas Fleet would remain safely in port, as in the previous bombardment.
The Admiral Hipper class of heavy cruisers was ordered in the context of German naval rearmament after the Nazi Party came to power in 1933 and repudiated the disarmament clauses of the Treaty of Versailles. Further repairs were necessary, and so the operation was postponed another week, by which time the Wilhelmshaven dockyard assured Scheer that the ship would be ready. , For defense against torpedo boats, the ship was also armed with twelve 8.8 cm (3.5 in) SK L/45 quick-firing guns, which were mounted in casemates as well.
Il est nommé ainsi en l'honneur du général de cavalerie Friedrich Wilhelm von Seydlitz, qui s'est illustré sous Frédéric le Grand, notamment contre les Français, à la bataille de Rossbach (1757).
, "L/60" denotes the length of the gun in terms of, Shipwrecks and maritime incidents in April 1945, https://en.wikipedia.org/w/index.php?title=German_cruiser_Seydlitz&oldid=982950619, World War II aircraft carriers of Germany, World War II shipwrecks in the Baltic Sea, Creative Commons Attribution-ShareAlike License, 17,600 t (17,300 long tons; 19,400 short tons), 17,139 t (16,868 long tons; 18,893 short tons), This page was last edited on 11 October 2020, at 10:34.  As designed, her standard complement consisted of 42 officers and 1,340 enlisted men. Seydlitz was among the ships selected for conversion, along with several passenger liners.
 Informed of the situation, the Kaiser stated "I no longer have a navy. The turrets were protected by 250 mm (9.8 in) on the sides and armor ranging in thickness from 70–100 mm (2.8–3.9 in) on the turret roofs. By 16:54, the range between the ships decreased to 12,900 yards (11,800 m), which enabled Seydlitz's secondary battery to enter the fray. At 14:25, the remaining light cruisers—Strassburg, Stettin, Frauenlob, Stralsund, and Ariadne—rendezvoused with the battlecruisers.
At 27 knots (50 km/h; 31 mph), the torpedoes could reach 5,000 m (16,000 ft) and at 35 knots (65 km/h; 40 mph), the range fell to 2,200 m (7,200 ft).
The flames rose above the turrets as high as a house. , Shortly after the outbreak of World War I, a brief engagement between German light cruisers and a raiding force of British cruisers and battlecruisers took place on 28 August 1914. By 10:35, the range had closed to 17,500 yards (16,000 m), at which point the entire German line was within the effective range of the British ships. , Seydlitz mounted a nearly identical main battery to that of the preceding Moltke-class ships: ten 28 cm (11 in) SK L/50 guns[b] in five twin-gun turrets. On 24 November, the ship ran aground in the Kaiser Wilhelm Canal, but was quickly refloated.
, On 3 August 1915, Seydlitz, Moltke, and Von der Tann were transferred to the Baltic with I Reconnaissance Group (AG) to participate in a planned foray into the Riga Gulf. She had a draft of 9.29 m (30 ft 6 in) forward and 9.09 m (29 ft 10 in) aft.
The ship was also hit by a torpedo during the battle, causing her to take in over 5,300 metric tons of water and her freeboard was reduced to 2.5 m. She had to be lightened significantly to permit her crossing of the Jade Bar. , As was standard for German warships of the period, Seydlitz used Krupp cemented and nickel steel for her armor plating. The armored cruiser Yorck made a navigational error that led the ship into one of the German minefields. Ships; People; Ports; Photos; About
 At 11:01, Seydlitz struck back at Lion, and with a single 28 cm shell, knocked out two of Lion's engines. , Almost immediately after the Lowestoft raid, Vizeadmiral (Vice Admiral) Reinhard Scheer began planning another foray into the North Sea.  The Admiral Hippers were nominally within the 10,000-ton limit, though they significantly exceeded the figure. Using forced draft on trials, the engines provided up to 89,738 metric horsepower (88,510 shp) and a top speed of 28.1 knots (52.0 km/h; 32.3 mph). , Ingenohl decided that another raid on the English coast should to be carried out in the hopes of luring a portion of the Grand Fleet into combat where it could be destroyed. Electrical power was provided by six turbo generators that produced 1,800 kW at 220 V., The engines were designed to produce 63,000 metric horsepower (62,000 shp) and a top speed of 26.5 knots (49.1 km/h; 30.5 mph). On 2 November 1914, Seydlitz, followed by Moltke, Von der Tann, and the armored cruiser Blücher, along with four light cruisers, left the Jade Estuary and steamed towards the English coast. A second 380 mm shell penetrated the already disabled aft superfiring turret and detonated the cordite charges that had not already burned.