Indian Navy launches sixth Kalvari-class submarine Vagsheer.

According to information published by the Indian Navy on April 20, 2022, the sixth and last submarine Kalvari class named Vagsheer was launched at Mazagon Dock, Mumbai.
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Kalvari-class submarine INS Vagsheer, Mumbai. (Picture source: Indian Navy)

The Kalvari class is a class of diesel-electric attack submarines based on the Scorpène-class submarine being built for the Indian Navy. The submarines are designed by French naval defense and energy company DCNS (Naval Group) and are being manufactured by Mazagon Dock Limited in Mumbai.

The Kalvari class is capable of offensive operations across the entire spectrum of naval warfare including anti-surface warfare, anti-submarine warfare, intelligence gathering, mine laying, and area surveillance.

It has a length of 67.5 m (221 ft), height of 12.3 m (40 ft), overall beam of 6.2 m (20 ft) and a draught of 5.8 m (19 ft). It can reach a top speed of 20 kn (37 km/h) when submerged and a maximum speed of 11 kn (20 km/h) when surfaced.

The submarine has a range of 6,500 nmi (12,000 km) at 8 kn (15 km/h) when surfaced. Each ship is powered by four MTU 12V 396 SE84 diesel engines, has 360 battery cells (750 kg each), for power, and has a silent Permanently Magnetised Propulsion Motor.

Each submarine has 60 km of cabling and 11 km of piping. The class displaces 1,615 t (1,780 short tons) when surfaced and 1,775 t (1,957 short tons) when submerged.

This class is equipped with six 533-mm torpedo tubes for a combination of 18 heavyweight wire-guided German-made Surface and Underwater Target (SUT) torpedoes and SM39 Exocet anti-ship missiles or 30 mines in place of both.

The class is also fitted with mobile C303/S anti-torpedo decoys for self-defense. The weapon systems and sensors are integrated with Submarine Tactical Integrated Combat System (SUBTICS).

It has a sonar system is capable of Low-Frequency Analysis and Ranging (LOFAR) enabling long-range detection and classification. Each submarine has a complement of 8 officers and 35 sailors.