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| Class overview | |
|---|---|
| Operators |  Imperial German Navy |
| Preceded by | Moltke class |
| Succeeded by | Derfflinger class |
| Completed | 1 |
| Lost | 1 |
| History | |
 German Empire | |
| Name | Seydlitz |
| Namesake | Friedrich Wilhelm von Seydlitz |
| Ordered | 21 March 1910 |
| Builder | Blohm & Voss, Hamburg |
| Laid down | 4 February 1911 |
| Launched | 30 March 1912 |
| Commissioned | 22 May 1913 |
| Motto | Always forward |
| Fate |
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| General characteristics | |
| Class and type | Unique battlecruiser |
| Displacement | |
| Length | 200.6 m (658 ft 2 in) |
| Beam | 28.5 m (93 ft 6 in) |
| Draft | 9.29 m (30 ft 6 in) |
| Installed power |
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| Propulsion |
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| Speed | 26.5 knots (49.1 km/h; 30.5 mph) |
| Range | 4,200 nmi (7,800 km; 4,800 mi) at 14 knots (26 km/h; 16 mph) |
| Complement | 1,068 |
| Armament |
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| Armor |
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SMS Seydlitz[a] was a battlecruiser of the German Kaiserliche Marine (Imperial Navy), built in Hamburg. She was ordered in 1910 and commissioned in May 1913, the fourth battlecruiser built for the High Seas Fleet. She was named after Friedrich Wilhelm von Seydlitz, a Prussian general during the reign of King Frederick the Great and the Seven Years' War.[1] Seydlitz represented the culmination of the first generation of German battlecruisers, which had started with the Von der Tann in 1906 and continued with the pair of Moltke-class battlecruisers ordered in 1907 and 1908. Seydlitz featured several incremental improvements over the preceding designs, including a redesigned propulsion system and an improved armor layout. The ship was also significantly larger than her predecessors—at 24,988 metric tons (24,593 long tons; 27,545 short tons), she was approximately 3,000 metric tons heavier than the Moltke-class ships.
Seydlitz participated in many of the large fleet actions during World War I, including the battles of Dogger Bank and Jutland in the North Sea. The ship suffered severe damage during both engagements; during the Battle of Dogger Bank, a 13.5 in (34.3 cm) shell from the British battlecruiser Lion struck Seydlitz's rearmost turret and nearly caused a magazine explosion that could have destroyed the ship. At the Battle of Jutland she was hit twenty-one times by large-caliber shells, one of which penetrated the working chamber of the aft superfiring turret. Although the resulting fire destroyed the turret, the safety measures imposed after the battle of Dogger Bank prevented a catastrophe. 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. The ship inflicted severe damage on her British opponents as well; early in the battle, salvos from both Seydlitz and the battlecruiser Derfflinger destroyed the battlecruiser Queen Mary in seconds.
Seydlitz saw limited action in the Baltic Sea, when she provided screening for the German flotilla that at Battle of the Gulf of Riga attempted to clear the gulf in 1915. As with the rest of the German battlecruisers that survived the war, the ship was interned in Scapa Flow in 1918. The ship, along with the rest of the High Seas Fleet, was scuttled in June 1919, to prevent her seizure by the British Royal Navy. She was raised on 2 November 1928 and scrapped by 1930 in Rosyth.
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