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Kursura has a length of 91.3 m (300 ft) overall, a beam of 7.5 m (25 ft) and a draught of 6 m (20 ft). She displaces 1,950 t (1,919 long tons) surfaced, 2,475 t (2,436 long tons) submerged and has a maximum diving depth of 985 ft (300 m). The complement is about 75, including 8 officers and 67 sailors.
Telegraph dials aboard the submarine
The submarine has three shafts, each with a six-blade propeller. She is powered by three Kolomna 2D42M diesel engines, each with 2,000 horsepower (1,500 kW). She also has three electric motors, two of them with 1,350 hp (1,010 kW) and one with 2,700 hp (2,000 kW). She can achieve a maximum speed of 16 knots (30 km/h) when on surface, 15 knots (28 km/h) when submerged and 9 knots (17 km/h) while snorkelling. She has a range of 20,000 mi (32,000 km) at 8 kn (15 km/h; 9.2 mph) when surfaced and 380 mi (610 km) at 10 kn (19 km/h; 12 mph) when submerged. There are 10 torpedo tubes to carry 22 Type 53 torpedoes. She could lay 44 mines instead of torpedoes. She also had a snoop tray and I-Band radar for surface search.
During the Indo-Pakistani War of 1971, Kursura operated in the Arabian Sea. She was given the patrol duties at two designated areas before the war started, but was ordered to operate under two restrictions: she was not to cross demarcated shipping corridors and she could attack a target only after positive identification. The aims of her patrol were to sink any Pakistani naval warships, to sink merchant shipping when specifically ordered, and to conduct general patrol and surveillance.
She started from her home port on 13 November 1971 and reached her patrol location by 18 November. She remained there until 25 November when she was shifted to a new patrol location and remained there until 30 November. On 30 November, she rendezvoused with Karanj at sea to transfer instructions and subsequently then left for Bombay and reached there by 4 December 1971. During her patrols, she encountered fair weather and monitored a number of tankers and commercial aircraft flying on international routes. She was originally intended to lay mines but the plan was later cancelled.