The Indian Navy celebrated Submarine Day on 8th Dec.
- It was on December 8 that the Indian Naval Ensign was unfurled on INS Kalvari, the first submarine to be inducted in the Indian Navy, at Riga in Latvia, the erstwhile USSR, in 1967.
- Kalvari is the Malayalam name for Tiger Shark, a predator in the Indian Ocean. The Kalvari was decommissioned in 1996 after 29 years of service.
- INS Kalvari was a diesel-electric submarine of the Foxtrot Class from the erstwhile USSR.
- It was a 91.3-metre-long submarine, which carried a crew of 75.
- It has a surface speed of 16 knots while the submerged speed was 15 knots.
- It had a range of 32,000 km at a speed of 8 knots when on surface and a submerged range of 610 km at a speed of 10 knots.
- It could carry 22 torpedoes and 42 mines in lieu of torpedoes.
- Commander KS Subramanian, the first Commanding Officer of INS Kalvari, brought the submarine from St Petersberg in Russia to Vishakhapatnam in India.
- After INS Kalvari, three more submarines - Karanj, Khanderi and Kursura - were commissioned in the Indian Navy along with submarine support vehicle Amba.
- A submarine rescue ship, INS Nistar, was also commissioned in 1972.
- The Indian Navy is inducting several submarines in Kalvari Class, named after the very first submarine inducted into service.
- INS Kalvari, a diesel-electric submarine of Scorpene-class, was inducted into service in 2017 after having being built at the Mazagon dock in Mumbai. It has been designed by French company DCNS.
- INS Khanderi is the other submarine of Kalvari class currently in service. The other submarines slated to join service under this class are Vela, Karanj, Vaghir and Vaghsheer.a