Nazario Sauro 1990
| Name | No | Yard No | Builder | Laid down | Launched | Comm | Fate |
| Nazario Sauro | S518 | CRDA, Monfalcone | 26.6.1974 | 9.10.1976 | 12.2.1980 | stricken 4.2002 | |
| Carlo Fecia di Cossato | S519 | CRDA, Monfalcone | 15.11.1975 | 16.11.1977 | 5.11.1979 | stricken 4.2005 | |
| Leonardo da Vinci | S520 | Italcantieri, Monfalcone | 8.6.1978 | 20.10.1979 | 23.10.1981 | stricken 6.2010 | |
| Guglielmo Marconi | S521 | Italcantieri, Monfalcone | 23.10.1979 | 20.9.1980 | 11.9.1982 | stricken 10.2003 |
|
Displacement standard, t |
|
|
Displacement normal, t |
1456 / 1641 |
|
Length, m |
63.9 |
|
Breadth, m |
6.83 |
|
Draught, m |
5.70 |
|
No of shafts |
1 |
|
Machinery |
3 GMT A210-16NM diesel-generators, 1 Marelli electric motor |
|
Power, h. p. |
3515 |
|
Max speed, kts |
11 / 19.3 |
|
Fuel, t |
diesel oil 144 |
| Endurance, nm(kts) | 6150(11) / 250(4) |
|
Armament |
6 - 533 TT (6 bow B-512, 12 torpedoes) |
|
Electronic equipment |
BPS-704 radar, IPD-70/S, MD 100S, Velox M5 sonars, BLD-727 Thetis ECM suite, SISU-1 CCS |
|
Complement |
49 |
|
Diving depth operational, m |
250 |
Project history: This class was delayed by both financial and technical problems. Sauro and Cossato originally ordered in 1967, but budget difficulties caused them to be cancelled and they were not reordered until 1972. Their completion was then delayed because their batteries did not work properly, and different batteries had to be purchased from Sweden. The first two did not commission until March 1980. These were the first Italian submarines built of HY-80 steel.
Modernizations: 1990, Nazario Sauro, Carlo Fecia di Cossato; 1992, Guglielmo Marconi; 1995, Leonardo da Vinci: - SISU-1 CCS; + Sub-Harpoon SSM (4 UGM-84 instead of 4 torpedoes), BSN-716(v)1 CCS
Naval service: No significant events.
Nazario Sauro 1980
Carlo Fecia di Cossato 2001
© Ivan Gogin, 2017