Upholder 1995
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| Upholder | S40 | VSEL, Barrow | 11/1983 | 2.12.1986 | 9.6.1990 | to Canada 7.1998 (Chicoutimi) | |
| Unseen | S41 | Cammell Laird, Birkenhead | 12.8.1987 | 14.11.1989 | 20.7.1991 | to Canada 7.1998 (Victoria) | |
| Ursula | S42 | Cammell Laird, Birkenhead | 28.8.1987 | 22.2.1991 | 8.5.1992 | to Canada 7.1998 (Corner Brook) | |
| Unicorn | S43 | Cammell Laird, Birkenhead | 13.3.1989 | 16.4.1992 | 25.6.1993 | to Canada 7.1998 (Windsor) |
|
Displacement standard, t |
1870 |
|
Displacement normal, t |
2185 / 2400 |
|
Length, m |
70.3 |
|
Breadth, m |
7.60 |
|
Draught, m |
5.50 |
|
No of shafts |
1 |
|
Machinery |
2 Paxman Valenta 16RPA 200SZ diesel-generators, 1 electric motor |
|
Power, h. p. |
5400 |
|
Max speed, kts |
12 / 20 |
|
Fuel, t |
diesel oil 200 |
|
Endurance, nm(kts) |
8000(8) / 270(3) |
|
Armament |
6 - 533 TT (bow, 18, inc 4 Sub-Harpoon SSM (UGM-84B2), mines) |
|
Electronic equipment |
S40: type 1007 radar, type 2040, type 2041 MicroPUFFS, type 2026 towed array, type 2019 PARIS sonars, UAC ECM suite, 2x SSE Mk 8 decoy launchers, DCC CCS S41-43: type 1007 radar, type 2040, type 2041 MicroPUFFS, type 2046 towed array, type 2019 PARIS sonars, UAC ECM suite, 2x SSE Mk 8 decoy launchers, DCC CCS |
|
Complement |
44 |
|
Diving depth operational, m |
260 |
Project history: A new type of 'conventional' submarine was announced in September 1979, to replace the Oberons and to make up numbers for training. Although at one time twelve boats were planned this dropped to ten and then nine, but under the 1990-91 defence cuts the class was stopped at four units.
The first four were fitted with Type 2040 sonar, derived from the French Eledone and Netherlands Octopus, but plans to replace this with Type 2075 were dropped in 1991. This class was declared surplus to requirements in 1994.
Modernizations: late 1990s, all: - UAC ECM suite; + UAP(2) ECM suite
Naval service: No significant events.
© Ivan Gogin, 2016