Kalvari-class submarine (1967)

Kalvari class submarine (Foxtrot-class) of the Indian Navy
Class overview
Name:	Kalvari class
Builders:	Sudomekh, Admiralty Shipyard
Operators:	Indian Navy
Succeeded by:	Vela class
In commission:	1967–2003
Completed:	4
Retired:	4
Preserved:	1
General characteristics
Type:	Submarine
Displacement:	1,950 t (1,919 long tons) surfaced 2,475 t (2,436 long tons) submerged
Length:	91.3 m (299 ft 6 in)
Beam:	7.5 m (24 ft 7 in)
Draught:	6 m (19 ft 8 in)
Speed:	16 knots (30 km/h; 18 mph) surfaced 15 knots (28 km/h; 17 mph) submerged
Range:	20,000 mi (32,000 km) at 8 knots (15 km/h; 9.2 mph) surfaced 380 mi (610 km) at 10 knots (19 km/h; 12 mph) submerged
Test depth:	250 m (820 ft)
Complement:	75 (incl 8 officers)
Armament:	10 533mm torpedo tubes with 22 SET-65E/SAET-60 torpedoes 44 mines in lieu of torpedoes

Kalvari-class submarines were the first submarines inducted into the Indian Navy. They were variants of the early Soviet Foxtrot-class submarines. Four of the class served in the Indian Navy. Four additional variants of the later Foxtrot class were inducted as the Vela class.

INS Kursura has been preserved as a museum on Ramakrishna Mission Beach in Visakhapatnam. The sail of the lead vessel, INS Kalvari is also on display at the Visakhapatnam city museum.