Pisa-class cruiser
Introduction The '''''Pisa'' class''' consisted of three armored cruisers built in Italy in the first decade of the 20th century. Two of these were for the Royal Italian Navy (''Regia Marina'') and the third was sold to the Royal Hellenic Navy and named . This ship served as the Greek flagship for the bulk of her active career and participated in the Balkan Wars of 1912–1913, fighting in two battles against the Ottoman Navy. She played a minor role in World War II after escaping from Greece during the German invasion in early 1941.Influenced by communist agitators, her crew mutinied in 1944, but it was suppressed without any bloodshed. ''Georgios Averof'' returned to Greece after the German evacuation in late 1944 and became a museum ship in 1952.She is the only surviving armored cruiser in the world.The two Italian ships participated in the Italo-Turkish War of 1911–1912 during which they supported ground forces in Libya with naval gunfire and helped to occupy towns in Libya and islands in the Dodecanese. They played a minor role in World War I after a submarine sank  shortly after Italy joined the war in 1915.Her sister ship, , became a training ship after the war and was broken up for scrap in 1937.
Design and description Right elevation and plan drawings from Brassey's Naval Annual 1915The ''Pisa'' class was designed in 1904 by Italian engineer Giuseppe Orlando, who attempted to replicate on a smaller scale the armament and armor of the s then entering the service of the ''Regia Marina''. The Italians classified large armored cruisers like the ''Pisa''s as second-class battleships. For ships of their displacement, they were considered to have been heavily armed, but inferior to battlecruisers, a type introduced during their lengthy construction time.The ''Pisa''-class ships had a length between perpendiculars of  and an overall length of . They had a beam of  and a draft of . The ships displaced  at normal load, and  at deep load. The ''Pisa'' class had a complement of 32 officers and 652 to 655 enlisted men.===Propulsion===The ships were powered by two vertical triple-expansion steam engines, each driving one propeller shaft using steam supplied by 22 Belleville boilers. Designed for a maximum output of  and a speed of , both ships handily exceeded this, reaching speeds of  during their sea trials from . They had a cruising range of about  at a speed of  and  at a speed of .===Armament===A view of ''Pisa''s aft superstructure and gun turrets, probably around 1912.The leftmost turret is her rear main gun turret while the right one is one of her secondary turrets.The main armament of the two Italian ''Pisa''-class ships consisted of four Cannone da 254/45 V Modello 1906 guns in hydraulically powered, twin-gun turrets fore and aft of the superstructure. The  gun fired  armor-piercing (AP) projectiles at a muzzle velocity of . The Royal Hellenic Navy preferred smaller 234 mm (9.2 in) guns purchased from Britain for ''Georgios Averof'', but the ship was otherwise armed nearly identically to her half-sisters. The  shell of the Elswick Pattern 'H' gun was fired at a muzzle velocity of .The Italian ships mounted eight Cannone da 190/45 V Modello 1906 in four hydraulically powered twin-gun turrets, two in each side amidships, as their secondary armament. These Vickers  guns fired AP shells at . The Elswick Pattern 'B' 7.5-inch guns aboard ''Georgios Averof'' used  AP shells which were fired at muzzle velocities of .For defense against torpedo boats, all three ships mounted 16 Vickers quick-firing (QF) Cannone da 76/50 V Modello 1908 guns. This gun fired a  projectile at a muzzle velocity of . The ships were also fitted with eight (''Pisa'' and ''Amalfi'') or four (''Georgios Averof'') QF Cannone da 47/40 V Modello 1908 guns. The two Italian ships were equipped with three submerged  torpedo tubes while those of ''Georgios Averof'' were  in diameter.During World War I, ''Pisa''s 76 and 47 mm guns were replaced by twenty 76/40 guns; six of these were anti-aircraft (AA) guns while ''Georgios Averof'' received one additional 76 mm AA gun. During her 1925 refit, the latter ship had her light armament changed to four 76 mm low-angle guns, two 76 mm AA guns, four 47 mm low-angle guns and five 40 mm AA guns.===Protection===All three ships were protected by an armored belt that was  thick amidships and reduced to  at the bow and stern. The armored deck was  thick. The conning tower armor was  thick. The 254 mm gun turrets were protected by  of armour while the 190 mm turrets had .
Ships + Construction dataNameBuilderLaid downLaunchedCompletedFateOrlando, Livorno 20 February 1905 15 September 1907 1 September 1909 Discarded, 28 April 1937Odero, Genoa-Sestri Ponente 24 July 1905 5 May 1908 1 September 1909 Sunk, 7 July 1915Orlando, Livorno 1907 12 March 1910 16 May 1911 Training accommodation ship, Poros Island, 1952–1983Museum ship, 1984
Careers ''Amalfi'' underway at slow speedTwo of the three ''Pisa''-class armored cruisers were originally built for the ''Regia Marina''. The third ship was built on speculation and was sold to Greece and completed as ''Georgios Averof'', named after a wealthy Greek businessman who had left a sizeable legacy for the increase of the Greek Navy in his will. The ship participated in the Coronation Fleet Review for King George V of the United Kingdom in 1911 shortly after commissioning. She served in the Balkan Wars and was instrumental in the Greek victories over the Ottoman Empire in the Battles of Elli and Lemnos during the First Balkan War. During World War I, ''Georgios Averof'' did not see much active service, as Greece was neutral during the first years of the war. After the ''Noemvriana'' riots of 1916, she was seized by the French to ensure that she could do nothing against the Entente. After the war's end, the ship participated in the Greco-Turkish War of 1919–1922 and helped in the evacuation of the refugees after the Greek Army's defeat. In 1925–1927 ''Georgios Averof'' was reconstructed in France and rearmed.The ship was seized by rebels during the failed 1935 Greek coup d'état attempt and was present at the 1935 Silver Jubilee Fleet Review for King George V. During World War II, the ship escaped to Egypt after the Allied defense began to collapse in 1941 during the Battle of Greece. She performed convoy escort and patrolling duties in the Indian Ocean until the end of 1942.Her crew mutinied in early 1944 under the influence of communist sympathizers of the National Liberation Front. The mutiny was suppressed and she ferried the Greek government-in-exile to Athens in late 1944.She was decommissioned in 1952 and is now preserved as a museum ship in Faliron Bay near Athens. ''Georgios Averof'' is the only armored cruiser still in existence.The camouflaged ''Georgios Averof'', RN Bombay Station, 1942, while serving under Royal Navy command''Pisa'' and ''Amalfi'' both participated in the Italo-Turkish War of 1911–1912, during which ''Pisa'' supported the occupations of Tobruk, Libya and several islands in the Dodecanese while ''Amalfi'' briefly blockaded Tripoli and supported the occupation of Derna, Libya. The sisters came together in 1912 and they bombarded the fortifications defending the entrance to the Dardanelles in July. After the end of the war, ''Amalfi'' escorted the Italian king and queen on the royal yacht to Germany and Sweden during a 1913 visit.After ''Amalfi'' was sunk by the submarine  (actually the Imperial German submarine SM ''UB-14'' flying the Austro-Hungarian flag) on 7 July 1915, ''Pisa''s activities were limited by the threat of submarine attack, although the ship did participate in the bombardment of Durazzo, Albania in late 1918.After the war she became a training ship and was stricken from the Navy List in 1937 before being scrapped.
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References ***** **** * *
External links *  Classe Pisa Marina Militare website* Official website of the ''Giorgios Averof''