|Name||No||Yard No||Builder||Laid down||Launched||Comp||Fate|
|Ammiraglio Cagni||CRDA, Monfalcone||9.1939||20.7.1940||4.1941||discarded 2.1948|
|Ammiraglio Caracciolo||CRDA, Monfalcone||10.1939||16.10.1940||6.1941||scuttled 11.12.1941|
|Ammiraglio Millo||CRDA, Monfalcone||10.1939||31.8.1940||5.1941||sunk 14.3.1942|
|Ammiraglio Saint-Bon||CRDA, Monfalcone||9.1939||6.6.1940||3.1941 (delivered incomplete)||sunk 5.1.1942|
|Displacement standard, t||1504|
|Displacement normal, t||
1653 / 2136
|No of shafts||
2 CRDA diesels / 2 CRDA electric motors
|Power, h. p.||
4370 / 1800
|Max speed, kts||
17 / 8.5
diesel oil 180
|Endurance, nm(kts)||10700(12) / 107(3.5)|
2 x 1 - 100/47 OTO 1938, 2 x 2 - 13.2/76, 14 - 450 TT (8 bow, 6 stern, 36)
|Diving depth operational, m||100|
Largest attack submarines of WWII-era Italian Navy. The design was developed by builder. Single-hulled, with external bulges. This class submarines were intended, first of all, for operations against merchant shipping on ocean routes. In connection with that torpedoes calibre was decreased, but the number of spare torpedoes was sharply increased. Thanks to large dimensions Cagni class submarines had good seaworthiness and habitability, thus differed by quite good manoeuvrability.
In 1943 Ammiraglio Cagni was converted to transport submarine for routes to Japan.
1943, Ammiraglio Cagni: was converted to transport.
Ammiraglio Caracciolo was scuttled by crew 11.12.1941 near Bardia, having received heavy damages after attack of British escort destroyer Farndale. Ammiraglio Saint-Bon was sunk 5.1.1942 N off Sicily by British submarine Upholder. Ammiraglio Millo was sunk 14.3.1943 in Ionian sea by British submarine Ultimatum.