SMS Lützow was a German battlecruiser (Grosser Kreuzer), the keel of which was laid in May 1912, the launch took place in November 1913, and entry into service with the Kaiserliche Marine took place in March 1916. The length of the ship was 210.4 meters, with a maximum width of about 29 meters. Full displacement reached 31,200 tons, and the maximum speed did not exceed 27 knots. The armament of the unit consisted of: 8 305 mm guns, 14 150 mm guns, 4 88 mm rapid-fire guns and 4 torpedo tubes. SMS Lützow was the second of three Derfflinger-class battleships. This type of unit was developed as a kind of German response to the British Lion-class battlecruisers. Their construction was largely based on the design of the Seydlitz type units, with significant modifications in the caliber and spacing of the main artillery, as well as in the propulsion system. SMS Lützow was built at the Shichau shipyard in Gdańsk. During the sea trials in 1915, one of the elements of the propulsion system had a serious failure, which meant that the ship entered service only at the beginning of 1916. Immediately after that, she was assigned to the 1st Reconnaissance Group, which also included other Derfflinger-class ships. SMS Lützow took a very active part in the Battle of Jutland in 1916 and contributed to the damage to HMS Lion and the sinking of HMS Invincible. However, the ship itself during this battle probably received 24 hits with heavy artillery shells and sank as a result of the sustained damage.SMS Derfflinger was a German battlecruiser (German Grosser Kreuzer), the keel of which was laid in March 1912, the launch took place in July 1913, and entry into service with the Kaiserliche Marine took place in September 1914. The length of the ship was 210.4 meters, with a maximum width of about 29 meters. Full displacement reached 31,200 tons, and the maximum speed did not exceed 27 knots. The armament of the unit consisted of: 8 305 mm guns, 12 150 mm guns, 8 88 mm rapid-fire guns and 4 torpedo tubes. SMS Derfflinger was the first of three battlecruisers in the class of the same name, the Derfflinger. This type of unit was developed as a kind of German response to the British Lion-class battlecruisers. Their construction was largely based on the design of the Seydlitz type units, with significant modifications in the caliber and spacing of the main artillery, as well as in the propulsion system. SMS Derfflinger was built at the Blohm und Voss shipyard in Hamburg, and in November 1914 the unit became part of the 1st Reconnaissance Group, which over time also included the other Derfflinger-class ships. The ship took part in the bombing of Scarborough in 1914 and the Battle of Dogger Bank in 1915, as well as in the greatest naval battle of World War I - the Battle of Jutland (1916). He was instrumental in the sinking of HMS Queen Mary and HMS Invincible during the Jutland Battle. After World War I, the ship was interned at the British base at Scapa Flow, where on June 21, 1919, she was self-sunk by her own crew.