O'Brien 1980
| Name | No | Yard No | Builder | Laid down | Launched | Comm | Fate |
| O'Brien | 22 | Scott-Lithgow, Greenock, UK | 17.1.1971 | 21.12.1972 | 15.4.1976 | stricken 3.2003 | |
| Hyatt | 23 | Scott-Lithgow, Greenock, UK | 16.1.1972 | 26.9.1973 | 27.9.1976 | stricken 4.2000 |
|
Displacement standard, t |
1650 |
|
Displacement normal, t |
2070 / 2450 |
|
Length, m |
87.5 pp 89.9 oa |
|
Breadth, m |
8.07 |
|
Draught, m |
5.48 |
|
No of shafts |
2 |
|
Machinery |
2 Admiralty Standard Range 16VVS-AS21 diesel-generators, 2 electric motors |
|
Power, h. p. |
3680 / 6000 |
|
Max speed, kts |
15 / 17.5 |
|
Fuel, t |
diesel oil 253 (emergency 379) |
| Endurance, nm(kts) | 9000(12) / |
|
Armament |
8 - 533 TT (6 bow, 22 Mk 8, SST-4 + 2 aft, 4 Mk 23) |
|
Electronic equipment |
type 1006 radar, type 2007, type 187, type 197, type 719 sonars, Porpoise ECM suite, Mk 2, Mk 4 Mod.1B torpedo decoy launchers |
|
Complement |
68 |
|
Diving depth operational, m |
230 |
Project history: Both units of British Oberon class were ordered in 1969. They suffered delays in fitting out due to recabling.
Modernizations: 1994, both: - 2 - 533 TT (aft), type 2007, type 187, type 197, type 719 sonars; + CSU-90 sonar suite, ISUS-90 CCS
Naval service: Hyatt and O'Brien collided with each other on surface in April 1987.
O'Brien 1979
© Ivan Gogin, 2018