|Name||No||Yard No||Builder||Laid down||Launched||Comp||Fate|
|P41, 1.1943- Uredd||P41||Vickers-Armstrong, Barrow, UK||1940||24.8.1941||12.1941||sunk 10.2.1943|
|Ula (ex-Varne)||P81, 1950- S300||Vickers-Armstrong, Barrow, UK||11.1942||22.1.1943||4.1943||stricken 7.1964|
|Displacement standard, t||
|Displacement normal, t||
630 / 732
4.52 - 4.65
|No of shafts||
2 Paxman-Ricardo or Paxman diesel-generators, 2 electric motors
|Power, h. p.||
615 / 825
|Max speed, kts||
11.25 / 10
diesel oil 38, later 55
|Endurance, nm(kts)||4050(10) / 30(9)|
P41: 1 x 1 - 76/40 12pdr 12cwt QF Mk I/II/V, 4 - 533 TT (bow, 8)
Ula: 1 x 1 - 76/45 20cwt QF Mk II, 4 - 533 TT (bow, 8 torpedoes or 6 M2 mines)
P41: type 286PW radar, type 129, type 138 sonars
Ula: type 291W radar, type 129, type 138 sonars
|Diving depth operational, m||60|
British submarines of U class, transferred to Norway before completing.
These submarines were originally reflected as unarmed targets for training of crews of escort ships. Already after design approval it was decided to arm them with TT. Construction of a fore end was changed for placing 4 TT in pressure hull and two more out of it, in a special fin. Single-hulled. Feature of this class that there on shafts only electric motors were and diesels used only in a role of generators. There were first British pure diesel-electric submarines.
1955-1956, Ula: external streamlining, snorkel and new radar were installed.
Uredd was lost being mined at Bodö (coast of Norway) 10.2.1943.