| Class overview | |
|---|---|
| Builders | Cos.Mo.S in Livorno, Italy |
| Operators | |
| Succeeded by | Cosmos class |
| Built | 1966–72 |
| In commission | 1972–1993 |
| Planned | 10 |
| Completed | 10 |
| Lost | 1 |
| Scrapped | 4 |
| Preserved | 1 |
| General characteristics | |
| Type | SDV/Midget submarine |
| Displacement | 41 t (40 long tons; 45 short tons) |
| Length | 16 m (52 ft 6 in) |
| Beam | 2 m (6 ft 7 in) |
| Propulsion | Diesel-electric |
| Speed |
|
| Range | 1,200 miles (1,900 km) |
| Endurance | 14 days |
| Test depth | 100 m (328 ft) |
| Complement | 16, (4 operations, 3 SEAL Teams) |
The SX-404-class submarine,[1] was a class of midget submarines produced by the Italian firm Cos.Mo.S.