NAVYPEDIA

Photo

RN sister-ship Varangian 1946

Ships

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

Technical data

Displacement standard, t	540
Displacement normal, t	630 / 732
Length, m	60.0
Breadth, m	4.90
Draught, m	4.52 - 4.65
No of shafts	2
Machinery	2 Paxman-Ricardo or Paxman diesel-generators, 2 electric motors
Power, h. p.	615 / 825
Max speed, kts	11.25 / 10
Fuel, t	diesel oil 38, later 55
Endurance, nm(kts)	4050(10) / 30(9)
Armament	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)
Electronic equipment	P41: type 286PW radar, type 129, type 138 sonars Ula: type 291W radar, type 129, type 138 sonars
Complement	33
Diving depth operational, m	60

Standard scale images

Graphics

Project history

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.

Modernizations

1955-1956, Ula: external streamlining, snorkel and new radar were installed.

Naval service

Uredd was lost being mined at Bodö (coast of Norway) 10.2.1943.