Oberon class SS 
| Deplacement | 1,610/2,070/2,410 tons (2.417) |
| Speed | 17.5/15 kts |
| Dimensions | 89.92/87.45 x 8.07 x 5.48 meter |
| Armament | 8 533mm TT (6 fwd, 2 aft); 22 torpedoer |
| Electronics | Radar: 1 1006; Sonar: 1 207, 1 197, 1 719 |
| Machinery | 2 Admiralty Standard Range 16VVS-AS21 diesels, diesel-electric drive, 2 props; 6,000 hp |
| Range | - |
| Endurance | - |
| Man | 6+57 |
Australia: 6
| Nr./navn | Værft | Køllagt | Søsat | Tjeneste | Noter |
| S 57 Oxley | Scotts' SB & Eng., Greenock | 2-7-64 | 24-9-65 | 27-3-67 | - |
| S 59 Otway | Scotts' SB & Eng., Greenock | 29-6-65 | 29-11-66 | 22-4-68 | - |
| S 60 Onslow | Scotts' SB & Eng., Greenock | 26-5-67 | 29-8-68 | 22-12-69 | - |
| S 61 Orion | Scotts' SB & Eng., Greenock | 6-10-72 | 16-9-74 | 15-6-77 | - |
| S 62 Otama | Scotts' SB & Eng., Greenock | 28-5-73 | 3-12-75 | 27-4-78 | - |
| S 70 Ovens | Scotts' SB & Eng., Greenock | 17-6-66 | 5-12-67 | 18-4-69 | - |
Brazil: 3
| Nr./navn | Værft | Køllagt | Søsat | Tjeneste | Noter |
| S 20 Humaita | Vickers, Barrow, UK | 3-11-70 | 5-10-71 | 18-6-73 | stricken |
| S 21 Tonelero | Vickers, Barrow, UK | 18-12-70 | 22-11-72 | 8-9-78 | - |
| S 22 Riachuelo | Vickers, Barrow, UK | 26-5-73 | 6-9-75 | 12-3-77 | stricken 97 |
Canada: 3
| Nr./navn | Værft | Køllagt | Søsat | Tjeneste | Noter |
| SS 72 Ojibwa | H.M. DY, Chatham | 27-9-62 | 29-2-64 | 23-9-65 | ex Onyx |
| SS 73 Onandaga | H.M. DY, Chatham | 18-6-64 | 25-9-65 | 22-6-67 | - |
| SS 74 Okanagan | H.M. DY, Chatham | 25-3-65 | 17-9-66 | 22-6-68 | - |
Chile: 2
| Nr./navn | Værft | Køllagt | Søsat | Tjeneste | Noter |
| S 22 O'Brien | Scott Lithgow | 17-1-71 | 21-12-72 | -4-76 | - |
| S 23 Hyatt | Scott Lithgow | 16-1-72 | 26-9-73 | 27-9-76 | - |
Storbritannien: 13
| Nr./navn | Værft | Køllagt | Søsat | ||
| S 09 Oberon | H M Dockyard, Chatham | 28-11-57 | 18-7-59 | 24-2-61 | udfaset |
| S 10 Odin | Cammell Laird | 27-4-59 | 4-11-60 | 3-5-62 | udfaset |
| S 11 Orpheus | Vickers-Armstrong | 16-4-59 | 17-11-59 | 25-11-60 | udfaset |
| S 12 Olympus | Vickers-Armstrong | 4-3-60 | 14-6-61 | 7-7-62 | |
| S 13 Osiris | Vickers-Armstrong | 26-1-62 | 29-11-62 | 11-1-64 | |
| S 14 Onslaught | 8-4-59 | 24-9-60 | 14-8-62 | ||
| S 15 Otter | 15-5-61 | 20-8-62 | |||
| S 16 Oracle | Cammell Laird | 26-9-61 | 14-2-63 | ||
| S 17 Ocelot | 5-5-62 | 31-1-64 | |||
| S 18 Otus | 17-10-62 | 5-10-63 | |||
| S 19 Opossum | Cammell Laird | 23-5-63 | 5-6-64 | ||
| S 20 Opportune | Scotts SB, Greenock | 26-10-62 | 14-2-64 | 29-12-64 | |
| S 21 Onyx | Cammell Laird | 16-11-64 | 18-8-66 | 20-11-67 |