Capitan O'Brien-class submarine (1928)

Class overview
Builders	Vickers
Operators	Chilean Navy
In commission	1929–1958
Completed	3
Retired	3
General characteristics
Displacement	list error: <br /> list (help); Surfaced - 1540 tons; Submerged - 2020 tons
Length	260 ft (79 m)
Beam	28 ft (8.5 m)
Draught	13 ft 6 in (4.11 m)
Propulsion	list error: mixed text and list (help); 2 shaft diesel electric Vickers diesels - 2750 hp; Electric motors - 1300 hp; ;
Speed	Surfaced - 15 knots Submerged - 9 knots
Crew	54
Armament	Eight 21in torpedo tubes (6 bow, 2 stern 14 torpedoes) 1 - 4.7 in deck gun

The Capitan O'Brien class were three submarines built for the Chilean Navy in the late 1920s. They were similar to the contemporary British Odin class submarines, but mounted a larger 4.7 inch deck gun and were slightly smaller.

Ships

All boats were built by Vickers in Barrow-in-Furness and commissioned in 1929

Ship	Launched	Decommissioned
Almirante Simpson, named after Robert Winthrop Simpson	15 January 1928	1957
Capitan O'Brien	2 October 1928	1957
Capitan Thompson	15 January 1929	1958

The two Oberon class submarines purchased by Chile in the 1970s were also known locally as the O'Brien class.

References

Conway's All the World's Fighting Ships 1922-1946