The Oberon-class submarines were a 40-boat class of British-built diesel-electric submarines based on the successful British Porpoise-class submarines. Eighteen were constructed for the Royal Navy, while another twenty-two were built and exported to other countries' navies: six to the Royal Australian Navy, seven to the Royal Canadian Navy, five for the Brazilian Navy, and four for the Chilean Navy. The Oberon-class served from the early 1960s to the mid-1990s before being replaced by newer more capable submarines.
The Dutch Zwaardvis-class submarines are based on the Oberon-class.
Unit Run
- HMS Oberon (S09)
- HMS Odin (S10)
- HMS Orpheus (S11)
- HMS Olympus (S12)
- HMS Osiris (S13)
- HMS Onslaught (S14)
- HMS Otter (S15)
- HMS Oracle (S16)
- HMS Ocelet (S17)
- HMS Otus (S18)
- HMS Opossum (S19)
- HMS Oppurtune (S20)
- HMS Onyx (S21)
- HMS Oribi (S22)
- HMS Observer (S23)
- HMS Obdurate (S24)
- HMS Obedient (S25)
- HMS Orwell (S26)
- HMIS Kursura (S20)
- HMIS Karanj (S21)
- HMIS Khanderi (S22)
- HMIS Kalvari (S23)
- HMAS Onslow (S A60)
- HMAS Orion (S A61)
- HMAS Otama (S A62)
- HMAS Otway (S A63)
- HMAS Ovens (S A64)
- HMAS Oxley (S A65)
- HMCS Oswegatchie (S C05)
- HMCS Oneida (S C06)
- HMCS Odawa (S C07)
- HMCS Ofxord (S C08)
- HMCS Outlook (S C09)
- HMCS Ophelia (S C10)
- HMCS Oakville (S C11)
- NRB Humaitá (S20)
- NRB Tonelero (S21)
- NRB Riachuelo (S22)
- NRB Angostura (S23)
- NRB Guanabara (S24)
- BAC O'Brien (S22)
- BAC Hyatt (S23)
- BAC Thomson (S24)
- BAC Simpson (S25)
- ORP Orzeł (292)
- ORP Sokół (293)
- ORP Kondor (294)
- ORP Bielik (295)