| Data for D621 Surcouf. |
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| Completed: | 1956-1957 |
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| Displacement: | 2750 tons standard, 3750 tons full load |
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| Dimensions: | Lenght over all: | 128,5m (422ft) |
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| | Beam: | 12,7m (42ft) |
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| | Draught: | 5m (16ft 5in) |
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| Propulsion: | 4 Indret boilers; |
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| | 2-shaft Rateau geared steam turbines; |
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| | 47 000 MW (63 000 hp) = 32 kt |
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| Weapons: | AAW: | 3 twin 5in (127mm) DP |
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| | | 3 twin 57mm AA |
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| | | 3 single 40 mm AA |
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| | ASW: | 2 triple banks of 550mm tubes for short torpedoes. |
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| | ASuW: | (Main guns) |
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| | | 2 triple banks of 550mm tubes for long torpedoes |
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| Sensors: | Surveillence: | DRBV-20A, DRBV-30, DRBV 11 |
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| | Fire Control: | |
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| | Sonars: | DUBV-1B, DUBA-1B |
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| Complement: | 19 + 328 |
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This was the original configuration. D621 Surcouf and most of her sisters were modified during their long service life.