|Italian submarine Luigi Torelli|
|Builder:||Oto (La Spezia, Italy)|
|Launched:||6 January 1940|
|Fate:||Scuttled 16 April 1946|
|Class & type:||Marconi-class submarine|
1,195 tons (standard)|
1,400t (full load)
|Length:||251 ft (77 m)|
|Beam:||22.4 ft (6.8 m)|
|Draught:||15.6 ft (4.8 m)|
(surfaced/submerged) diesel / electric , 2 shafts|
3,600 hp / 1,500 hp
|Speed:||17.8 / 8.2 knots (surfaced/submerged)|
1 x 100 mm gun|
4 x 13.2 mm anti-aircraft
8 x 21" torpedo tubes (4 bow, 4 stern)
Luigi Torelli was a Marconi-class submarine of the Italian navy during World War II. The vessel operated in the Atlantic from late-summer 1940 until mid-1943, then was sent to the Far East. After Italy’s surrender in 1943, the Torelli was taken over by the German Navy then, in the waning months of the war, the Japanese Imperial Navy. It was one of only two ships to serve in all three major Axis navies.
Luigi Torelli was built at the Oto shipyard in La Spezia, Italy. One of six boats of the Marconi class submarine, which were laid down in 1938-39, Luigi Torelli was launched in January 1940. Designed as an ocean-going vessel, she was intended for operations both in the Mediterranean and in the Atlantic.
When Italy entered World War II in June 1940 the Luigi Torelli was still completing its training and shakedown period. Afterward, it conducted a short reconnaissance mission in the Gulf of Genoa, and was then dispatched to the Atlantic to Bordeaux in occupied France to serve in the Italian submarine flotilla there.
Between 11–29 September 1940, the Luigi Torelli was assigned to patrol an area just off the Azores Islands. On 5 October 1940, she reached Bordeaux. In the following weeks, the boat left port several times and made short practice missions. On 15 January 1941, the Luigi Torelli sighted a small convoy and sank the Greek vessel Nemea, the Norwegian vessel Brask and the Greek vessel Nicolas Filinis. A fourth vessel was also damaged, but escaped due to the foul weather. This was one of the few examples of an Italian submarine achieving great results while participating in a Wolf pack attack, according to Regia Marina Italiana. Two weeks later, the Luigi Torelli sank the British vessel Urla. In July 1941, she sank the Norwegian tanker Ida Knudsen. A year later, she sank the British vessel Scottish Star and the Panamanian motor tanker Esso Copenhagen.
In 1943, the Luigi Torelli, after surviving at least two serious air attacks, was one of seven Italian submarines designated to be transformed into transports. The Italian boats, due to their dimensions, were deemed better suited for long voyages to the Far East on missions to acquire precious and rare material. The Luigi Torelli left for the Far East on 14 June 1943. The operation was under German control but the Luigi Torelli retained its Italian crew.
The Luigi Torelli was one of four Italian submarines in the Far East in 1943 when the new Italian government agreed to an armistice with the Allies. Of the four, the Luigi Torelli, Comandante Cappellini and Giuliani and their crews were temporarily interned by the Japanese. The Luigi Torelli and two other boats then passed to German U-boat command and, with mixed German and Italian crews, continued to fight against the Allies. The Kriegsmarine assigned new officers to the Luigi Torelli, renamed her the U.IT.25 and had her take part in German war operations in the Pacific.
Following the German surrender in 1945, the Luigi Torelli was again given a new name, the I-504, by the Japanese, and operated with the Imperial Japanese Navy until 30 August 1945. It retained a number of Italian submariners among its complement.
The Luigi Torelli and sister submarine Comandante Cappellini were the only two ships to fly the flags of all three main Axis powers during World War II.
As the I-504, the Torelli shot down a B-25 Mitchell bomber while under Japanese flag near the very end of the war in the Pacific, allegedly the last success by a Japanese naval vessel in the conflict.
Captured by the U.S. in Kobe, Japan, at the conclusion of the war, the Luigi Torelli was scuttled by the American Navy in the Kii Suido on 16 April 1946.
- Erminio Bagnasco, Submarines of World War Two, Cassell & Co, London. 1977 ISBN 1-85409-532-3
- Vincent O'Hara, Enrico Cernuschi: Dark Navy: The Italian Regia Marina and the Armistice of 8 September 1943 (2009). ISBN 1-934840-91-2
- Roger Chesneau, Robert Gardiner: Conway's All the Worlds Fighting Ships 1922-1946 (1980). ISBN 0-85177-146-7
- World War II Archives Foundation
- Regia Maria, Luigi Torelli
- Stories and Battle Histories of the IJN's Submarines, February 10, 2010, HIJMS Submarine I-504: Tabular Record of Movement
- Comando Supremo: Italy at War, Italian submarines and surface vessels in the far east: 1940-1945
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