Italian cruiser Pola
Line-drawing of Pola
|Laid down:||17 March 1931|
|Launched:||5 December 1931|
|Commissioned:||21 December 1932|
|Fate:||Sunk, 29 March 1941|
|Class & type:||Zara-class cruiser|
|Displacement:||13,944 long tons (14,168 t) full load|
|Length:||182.8 m (599 ft 9 in)|
|Beam:||20.6 m (67 ft 7 in)|
|Draft:||7.2 m (23 ft 7 in)|
|Installed power:||8 × 3-drum Yarrow boilers
95,000 shp (71,000 kW)
|Propulsion:||2 × Parsons steam turbines|
|Speed:||33 knots (61 km/h; 38 mph)|
|Range:||5,361 nmi (9,929 km; 6,169 mi) at 16 knots (30 km/h; 18 mph)|
|Armament:||8 × 203 mm (8 in)/53 cal. guns
16 × 100 mm (3.9 in)/47 cal. guns
6 × 40 mm/49 cal. guns
8 × 13.2 mm machine guns
|Armor:||Deck: 70 mm (2.8 in)
Belt armor: 150 mm (5.9 in)
Turrets: 150 mm
Pola was a Zara-class heavy cruiser of the Italian Regia Marina (Royal Navy). She was built in the Odero-Terni-Orlando shipyard in Livorno in the early 1930s and entered service in 1932. She was the third of four ships in the class, which also included Zara, Fiume, and Gorizia. Pola was built as a flagship with a larger conning tower to accommodate an admiral's staff. Like her sisters, she was armed with a battery of eight 203-millimeter (8.0 in) guns and was capable of a top speed of 32 knots (59 km/h; 37 mph).
Pola initially served as the flagship of the 2nd Squadron, and in 1940 she led the squadron during the battles of Calabria and Cape Spartivento, in July and November, respectively. During the latter engagement she briefly battled the British cruiser HMS Berwick. Pola was thereafter reassigned to the 3rd Division, along with her three sister ships. The ship took part in the Battle of Cape Matapan in March 1941. During the battle, she was disabled by a British airstrike. Later, in a fierce night engagement, Pola, Zara, Fiume, and two destroyers were sunk by the British Mediterranean Fleet with heavy loss of life.
Pola was 182.8 meters (600 ft) long overall, with a beam of 20.62 m (67.7 ft) and a draft of 7.2 m (24 ft). She displaced 13,944 long tons (14,168 t) at full load, though her displacement was nominally within the 10,000-long-ton (10,000 t) restriction set in place by the Washington Naval Treaty. Her power plant consisted of two Parsons steam turbines powered by eight oil-fired Yarrow boilers, which were trunked into two funnels amidships. Her engines were rated at 95,000 shaft horsepower (71,000 kW) and produced a top speed of 32 knots (59 km/h; 37 mph). She had a crew of 841 officers and enlisted men. Pola was designed to function as a squadron flagship, and so her forward superstructure was larger than that of her sisters, and was faired into the forward funnel.
She was protected with a armored belt that was 150 mm (5.9 in) thick amidships. Her armor deck was 70 mm (2.8 in) thick in the central portion of the ship and reduced to 20 mm (0.79 in) at either end. The gun turrets had 150 mm thick plating on the faces and the barbettes they sat in were also 150 mm thick. The main conning tower had 150 mm thick sides.
Pola was armed with a main battery of eight 203 mm (8.0 in) Mod 29 53-caliber guns in four gun turrets. The turrets were arranged in superfiring pairs forward and aft. Anti-aircraft defense was provided by a battery of sixteen 100 mm (3.9 in) 47-cal. guns in twin mounts, four 40 mm (1.6 in) guns in single mounts and eight 12.7 mm (0.50 in) guns in twin mounts. She carried a pair of IMAM Ro.43 seaplanes for aerial reconnaissance; the hangar was located in under the forecastle and a fixed catapult was mounted on the centerline at the bow.
Pola 's secondary battery was revised several times during her career. Two of the 100 mm guns and all of the 40 mm and 12.7 mm guns were removed in the late 1930s and eight 37 mm (1.5 in) 54-cal. guns and eight 13.2 mm (0.52 in) guns were installed in their place. Two 120 mm (4.7 in) 15-cal. starshell guns were added in 1940.
Pola, named for the eponymous city seized by Italy after World War I, was laid down at the Odero-Terni-Orlando shipyard in Livorno on 17 March 1931 and was launched on 5 December that year. Fitting-out work proceeded quickly, and the new cruiser entered service just over a year later on 21 December 1932.
World War II
At Italy's entrance into the Second World War on 10 June 1940, Pola was assigned as the flagship of Admiral Riccardo Paladini, commander of the 2nd Squadron, which also included the three Trento-class cruisers, three light cruisers, and seventeen destroyers. Pola 's first wartime operation was to cover a group of minelayers on the night of 10–11 June. On 12 June, Pola and the rest of the 2nd Squadron, along with ships from the 1st Squadron, sortied in response to British attacks on Italian positions in Libya. On 6 July, Pola and the rest of the 2nd Squadron escorted a convoy bound for North Africa; the following day, Italian reconnaissance reported a British cruiser squadron to have arrived in Malta. The Italian naval high command therefore ordered several other cruisers and destroyers from the 1st Squadron to join the escort for the convoy. The battleships Conte di Cavour and Giulio Cesare provided distant support. Two days later, the Italian battleships briefly clashed with the British Mediterranean Fleet in an inconclusive action off Calabria. In late September, the Italian fleet, including Pola, made a sweep for a British troop convoy from Alexandria to Malta, but it made no contact with the British ships.
Pola was present in the harbor at Taranto when the British fleet launched the nighttime carrier strike on Taranto on the night of 11–12 November, but she was not attacked in the raid. Another attempt to intercept a British convoy in late November resulted in the Battle of Cape Spartivento. The Italian fleet left port on 26 November and while en route to the British fleet, Pola and the battleship Vittorio Veneto were attacked by Swordfish torpedo bombers from the carrier HMS Ark Royal, but both ships evaded the torpedoes. The two fleets then clashed in an engagement that lasted for about an hour. During the brief action, Pola scored two hits on the British cruiser HMS Berwick and disabled one of her main battery turrets. Campioni broke off the action because he mistakenly believed he was facing a superior force, the result of poor aerial reconnaissance. The Italian fleet was reorganized on 9 December, and Pola joined her three sister ships in the 1st Squadron, which was now commanded by Admiral Angelo Iachino. On 14 December, a British air raid on Naples slightly damaged Pola.
Battle of Cape Matapan
The Italian fleet made another attempt to intercept a British convoy in the eastern Mediterranean south of Crete in late March 1941. This operation resulted in the Battle of Cape Matapan. For most of the daytime engagement, Pola and the rest of the 1st Division were stationed on the disengaged side the Italian fleet, and so did not see action during this phase. Vittorio Veneto was torpedoed by British aircraft from the carrier Formidable and was forced to withdraw, and the 1st Division remained on the port side of the Italian fleet to screen against another possible British attack. A second British airstrike later in the day failed to locate the retiring Vittorio Veneto and instead scored a single torpedo strike on Pola, hitting her amidships on her starboard side. In the confusion of the attack, Pola had nearly collided with Fiume and had been forced to stop, which had prevented her from taking evasive action. The damage filled three compartments with water and disabled five of her boilers and the main steam line that fed the turbines, leaving her immobilized.
Iachino was unaware of Pola 's plight until 20:10; upon learning of the situation he detached Fiume, Zara, and four destroyers to protect Pola. At around the same time, the British cruiser HMS Orion detected Pola on her radar and reported her location. The British fleet, centered on the battleships Valiant, Warspite, and Barham, was at this point only 50 nmi (93 km; 58 mi) away. The British ships, guided by radar, closed in on the Italians; at 22:10, Pola was about 6 nautical miles (11 km; 6.9 mi) from Valiant. Lookouts on the Italian cruiser spotted shapes approaching and assumed them to be friendly vessels, so they fired a red flare to guide them. Almost twenty minutes later, the British illuminated first Zara and then Fiume with their searchlights; the British battleships obliterated Fiume, Zara, and two destroyers in a point-blank engagement.
Pola initially was left alone during the action, and her captain, assuming that his ship would be the next target, ordered his crew to open the seacocks and abandon ship. About ten minutes after midnight, the destroyer Havock discovered Pola, still without power, in the darkness. A flotilla of British destroyers rushed to the scene, first discovering the abandoned Zara, which was still afloat; she was torpedoed and sunk by the destroyer Jervis. After picking up survivors, the destroyers joined Havock and a boarding party was prepared to take Pola, though it was discovered that most of her crew had jumped into the water, and the remaining men were huddled on the forecastle, ready to surrender. Jervis took off the surviving 22 officers and 236 enlisted men from Pola. Then the destroyer HMS Nubian torpedoed the ship while Jervis illuminated her with her searchlights. Pola 's magazines exploded and she sank at 04:03. A total of 328 men went down with the ship.
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