HMS Achates was a planned Amphion-class submarine of the Royal Navy, launched in 1945 but not completed and expended as a target off Gibraltar in June 1950.
Quick Facts History, United Kingdom ...
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| History |
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 United Kingdom |
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| Name | HMS Achates (P433) |
| Laid down | 8 March 1944 |
| Launched | 20 September 1945 |
| Fate | Expended as a target June 1950 |
| General characteristics if completed |
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| Class & type | Amphion-class submarine |
| Displacement | 1,360/1,590 tons (surface/submerged) |
| Length | 293 ft 6 in (89.46 m) |
| Beam | 22 ft 4 in (6.81 m) |
| Draught | 18 ft 1 in (5.51 m) |
| Propulsion | 2 × 2,150 hp (1,600 kW) Admiralty ML 8-cylinder diesel engine, 2 × 625 hp (466 kW) electric motors for submergence driving two shafts |
| Speed |
- 18.5 kn (34.3 km/h) surface, 8 kn (15 km/h) submerged
- 10,500 nmi (19,400 km) at 11 kn (20 km/h) surfaced
- 16 nmi (30 km) at 8 kn (15 km/h) or 90 nmi (170 km) at 3 kn (5.6 km/h) submerged
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| Test depth | 350 ft (110 m) |
| Complement | 60 |
| Armament | |
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