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| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
|---|---|---|---|---|---|---|---|
| U158 | 47 | KW Danzig | 1917 | 16.4.1918 | --- | BU on the stocks 1919 | |
| U159 | 48 | KW Danzig | 1917 | 25.5.1918 | --- | BU on the stocks 1919 |
| Displacement standard, t |
|
|---|---|
| Displacement normal, t | 811 / 1034 |
| Length, m | 71.2 |
| Breadth, m | 6.20 |
| Draught, m | 3.94 |
| No of shafts | 2 |
| Machinery | 2 MAN diesels / 2 SSW electric motors |
| Power, h. p. | 2400 / 1200 |
| Max speed, kts | 16 / 9 |
| Fuel, t | diesel oil 145 |
| Endurance, nm(kts) | 12370(8) / 55(5) |
| Armament | 1 x 1 - 105/42 Utof L/45 C/16, 6 - 500 TT (4 bow, 2 ster, 12 - 16) |
| Complement | 39 |
| Diving depth operational, m | 50 |
War order R. Double-hulled. They had a diving time of 35 seconds. Improved 'Project 43' (U115) type boats (themselves known as 'Project 25') of greatly enlarged radius of action, built by Danzig N Yd; they were very nearly finished by the end of the war, but broken up in situ.

