Constructed approximately 1961 Maximum range 18.000 sm Decommissioned 1991 Maximum surface speed 15,9 kn     Maximum underwater speed using electric motors 18 kn Weight 4.127 t Main engines: 2 diesel engines, 4000 hp each 8.000 hp Length 85,90 m Main electric engines: 6000 hp each 12.000 hp Width 9,70 m     Maximum submersion depth 300 m Bow torpedos - 533 mm calibre 6     Stern torpedos - 400 mm calibre 4 Crew 78-82 men Reserve torpedos - 400 mm calibre 8 Toilets 3     Shower 1 Fully tanked 670 t Endurance 90 days Fresh water 44 t     High press. compressed air with 200 kg/m2 37,8 m3 Maximum submersion period. 33 days Food supplies 17,4 t