NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Oberon (ex-O1)	P21 - N21		Chatham DYd	3/1924	24.9.1926	8/1927	BU 8.1945

Technical data

Max speed, kts, kn	13.75 / 7.5
Displacement standard, t	1311
Displacement normal, t	1598 / 1831
Length, m	82.2
Breadth, m	8.53
Draught, m	4.72
No of shafts	2
Machinery	2 Admiralty diesels / 2 electric motors
Power, h. p.	2950 / 1350
Fuel, t	diesel oil 160
Endurance, nm(kts)	5000(9.5) / 60(4)
Armament	1 x 1 - 102/40 QF Mk IV, 8 - 533 TT (6 bow, 2 stern, 16)
Electronic equipment	type 116 sonar
Complement	54
Diving depth operational, m	60

Standard scale images

Project history

Design of "O" class submarines was developed on the basis of "L" class. New ships intended for service on the Far East and so they required increased endurance and improved seaworthiness in comparison with prototype. Lead Oberon had saddle-tank construction and was built under the 1923 Programme, operational diving depth was 60 m, maximal was 155 m. Oil fuel tanks were outside of a pressure hull and were leaked at big depth. It was possible to be saved of this lack during repair, when riveted tanks were been replaced by welded (also fuel stowage has increased to 186t). Designed speed was 15/9kts, but it has not been even reached. Oberon became the first British submarine with sonar provided even at designing.

Modernizations

1930s: - 1 x 1 - 102/40 QF Mk IV; + 1 x 1 - 102/40 QF Mk XII

1930s: riveted fuel tanks were replaced by welded ones, fuel stowage rose up to 186 t.

1942 - 1943: + 1 x 1 - 20/70 Oerlikon Mk II/IV, type 286W or type 291W radar

Naval service

Submarine was laid up in 1944.