Editing Oberon-class submarine (section)

===Regional variations===
[[File:HMAS Oxley bow back.jpg|thumb|left|upright|The preserved bow section of {{HMAS|Oxley|S 57|6}}: The mouths of the six torpedo tubes are displayed, along with the modified sonar dome and a mockup of the bow sonar array.]]
;Australia
:The [[Royal Australian Navy]] acquired six ''Oberon''s: an initial order of four and a second order of two. The second order was originally for four submarines, but two were cancelled in favour of expanding the RAN [[Fleet Air Arm (RAN)|Fleet Air Arm]].<ref name=Stevens194>Stevens (ed.), ''The Royal Australian Navy'', p. 194.</ref>
:Australian ''Oberon''s had different electronic equipment, using primarily American sonar systems. They had [[Sperry Corporation|Sperry]] [[BQG-4]] Micropuffs passive ranging sonar and [[Krupp]] CSU3-41 attack sonar.<ref name=compedium/> Instead of the British Tigerfish torpedoes, the Australians used American [[Mark 48 torpedo]]es.<ref name=compedium/> They had a slightly larger payload, carrying 22 torpedoes for the forward tubes, six of which were preloaded. Shortly after entering service, the aft torpedo tubes in all six submarines were sealed.
:The Australian submarines were later updated to be equipped with the subsonic antiship [[Boeing Harpoon|Harpoon missile]]. In 1985, off the island of [[Kauai]] in [[Hawaii]], HMAS ''Ovens'' became only the second conventional submarine in the world—and the first ''Oberon''—to fire a subsurface-launched Harpoon missile, successfully hitting the target over the horizon. Consequently, the designation for the Australian ''Oberon''s changed from SS to SSG.

;Brazil
:The main differences between the Brazilian and British ''Oberon''s was the fire-control systems, with a Vickers system being fitted to the Brazilian boats.<ref name=compedium/> The three Brazilian submarines were later upgraded to use the more advanced Mod 1 Tigerfish torpedo.<ref name=compedium/>

;Canada
:The three Canadian submarines were built with improved air-conditioning systems, while as many common components as possible were replaced with Canadian equivalents.<ref name=compedium/> The Canadian ''Oberon''s used United States Navy torpedoes throughout their career: they were initially equipped with [[Mark 37 torpedo]]es, but were later upgraded for the [[Mark 48 torpedo|Mark 48s]].<ref name=compedium/>

;Chile
:Chilean submarines were identical to their British counterparts except for carrying German [[SUT torpedo]]es.<ref name=compedium/>