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Technical information for type IXB
| Crew | From 48 to 56 mens |
| Length | 76.5 m |
| Displacement (surfaced) | 1051 tons |
| Displacement (submerged) | 1178 tonnes |
| Max. speed (surfaced) | 18 knots |
| Max. speed (submerged) | 7 knots |
| Range (surfaced) | 12000 nm |
| Range (submerged) | 64 nm |
| Max. tested depth | 230 m |
| Torpedo tubes | 6 (bow : 4, stern : 2) |
| Torpedoes | 22 |
| Guns | 105 mm gun (1) - 20mm AA gun (from 1 to 4) |