The Nazario Sauro class are diesel-electric submarines operated by the Italian Navy. All boats were built by Fincantieri in Monfalcone.

History Italy developed the Sauro-class submarines in the 1970s to counter the underwater threat of the Soviet Union. Italian shipbuilding company Fincantieri built these vessels in Monfalcone.

The class entered service in 1980 and replaced the mixed fleet of , , and submarines. A further two units, Leonardo da Vinci and Guglielmo Marconi were commissioned in 1981 and 1982. In 1983 and 1988 two additional pairs of boats were ordered to the Improved Sauro-class design. They were delivered in 1988–1989 and 1994–1995 by Fincantieri. They were eventually succeeded by the (the joint German-Italian Type 212-based group).

Sauro and Cossato were Batch I boats while da Vinci and Marconi were Batch II boats. Pelosi and Prini made up Batch III and Longobardo and Priaroggia were the two Batch IV boats.

Batches I and II boats displacement was 1,456 tons surfaced and 1,641 tons submerged. The boats carried SMA SPS-704 radar and Elsag-USEA IPD70/S sonar system. Batch III 1,476 tons surfaced and 1,662 tons submerged. These boats had SMA MM/BPS-704-V2 radar and STN Atlas Elektronik-ISUS 90–20 series sonar. Batch IV 1,653 tons surfaced and 1,862 submerged weight.

Lengths varied between the batches. Beams measured 6.8 meters for all of the class. Draught was increased progressively from 5.3 meters to 6.3 meters. Armament of all the batches was 6 x 533mm torpedo tubes with 12 reloads carried. Batches I and II used Whitehead A-184 torpedo series while batches III and IV used upgraded Whitehead A-184 Mod 3 series.

Sauro and Marconi were retired in 2001 and 2002 respectively. In 2005, the remaining two original submarines were retired and the remaining four, Salvatore Pelosi (S522), Giuliano Prini (S523), Primo Longobardo (S524), and Gianfranco Gazzana Priaroggia (S525) were upgraded. These upgrades included replacement of the acoustic sensors and weapons control system, improvements in the communications system, and extension of the service lines.

US approached Italy to purchase retired Sauro-class submarines. Italy tentatively agreed but Taiwan rejected the offer. The plan called for the US to purchase four submarines when decommissioned, then refurbish them in the US and sell them to Taiwan. Once refurbished, the Italian submarines were expected to be operational for another 15 years, and the deal included an extension program.

Design There are three sub groups built in four batches: S 518 Nazario Sauro named after Nazario Sauro; since September 2009, this unit has been a museum ship in Genoa (part of Galata - Museo del mare). Site about the submarine maintained by the genoese museum. S 519 Carlo Fecia di Cossato named after Italian World War II submarine commander Carlo Fecia di Cossato S 520 Leonardo da Vinci, named after Leonardo da Vinci S 521 Guglielmo Marconi, named after Guglielmo Marconi S 522 Salvatore Pelosi, named after Italian World War II submarine commander and war hero Salvatore Pelosi S 523 Giuliano Prini, named after Italian World War II submarine commander and war hero Giuliano Prini S 524 Primo Longobardo, named after Italian World War II submarine commander and war hero Primo Longobardo S 525 Gianfranco Gazzana Priaroggia, named after Italian World War II submarine commander and war hero Gianfranco Gazzana-Priaroggia

List of boats

- Sauro classPennantnumberNameBatchShipyardHullnumberLaiddownLaunchedCommissionedDecommissionedImage S 518 I FincantieriMonfalcone(Gorizia) 4257 26 June 1974 9 October 1976 1 March 1980 30 April 2002 S 519 I FincantieriMonfalcone(Gorizia) 4258 15 November 1975 16 November 1977 5 November 1979 1 April 2005 S 520 II FincantieriMonfalcone(Gorizia) 4339 1 July 1976 20 October 1979 6 November 1982 30 June 2010 S 521 II FincantieriMonfalcone(Gorizia) 4340 23 October 1979 20 September 1980 11 September 1982 1 October 2003 S 522 III FincantieriMonfalcone(Gorizia) 4405 23 July 1985 29 November 1986 14 July 1988 in service S 523 III FincantieriMonfalcone(Gorizia) 4406 30 July 1987 12 December 1987 17 May 1989 in service S 524 IV FincantieriMonfalcone(Gorizia) 5878 19 December 1991 20 June 1992 14 December 1993 in service S 525 IV FincantieriMonfalcone(Gorizia) 5879 12 November 1992 26 June 1993 12 June 1995 in service

See also List of submarine classes in service

Equivalent submarines of the same era

Type 209

Notes

Bibliography

Further reading

External links

Sommergibili Marina Militare website