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| Name | No | Yard No | Builder | Laid down | Launched | Comm | Fate |
|---|---|---|---|---|---|---|---|
| Primo Longobardo | S524 | Italcantieri, Monfalcone | 19.12.1991 | 20.6.1992 | 14.12.1993 | in service (2019) | |
| Gianfranco Gazzana Priaroggia | S525 | Italcantieri, Monfalcone | 12.11.1992 | 26.6.1993 | 12.4.1995 | in service (2019) |
| Displacement standard, t | |
|---|---|
| Displacement normal, t | 1653 / 1862 |
| Length, m | 65.7 pp 66.4 oa |
| Breadth, m | 6.83 |
| Draught, m | 6.00 |
| No of shafts | 1 |
| Machinery | 3 GMT A210-16NM diesel-generators, 1 Marelli electric motor |
| Power, h. p. | 3265 |
| Max speed, kts | 12 / 20 |
| Fuel, t | diesel oil |
| Endurance, nm(kts) | 11000(11) / 250(4) |
| Armament | 6 - 533 TT (6 bow B-512, 12 torpedoes, inc. Sub-Harpoon SSM (4 UGM-84)) |
| Electronic equipment | BPS-704 radar, IPD-70/S, MD 100S, Velox M5 sonars, BLD-727 Thetis ECM suite, BSN-716(v)2 SACTIS CCS |
| Complement | 50 |
| Diving depth operational, m | 300 |
This is a further evolution of the Sauro design, slightly lengthened and with an improved hull form, carrying more fuel.
2001, Gianfranco Gazzana Priaroggia; 2002, Primo Longobardo: - BSN-716(v)2 SACTIS CCS; + ETBF towed sonar array, ISUS 90 CCS
No significant events.

