S21 or S-21 may refer to:
PNS/M Ghazi (S–130), SJ, was a Tench-class diesel-electric submarine, the first fast-attack submarine in the Pakistan Navy. She was leased from the United States Navy in 1963.
The Scorpène-class submarines are a class of diesel-electric attack submarines jointly developed by the French Naval Group and the Spanish company Navantia. It features diesel propulsion and an additional air-independent propulsion (AIP). It is now marketed as the Scorpène 2000.
INS Shalki (S46) is a Shishumar-class diesel-electric submarine of the Indian Navy. The submarine was the first ever submarine to be built in India.
The Kalvari-class submarines, formally classified as the Project-75 submarines (P-75), is a class of diesel-electric attack submarines operated by the Indian Navy. Currently being constructed by a syndicate of French and Indian shipyards, namely, Naval Group and Mazagon Dock Limited (MDL) respectively, the class is an export derivative of the French-origin Scorpène-class submarine, originally designed by Naval Group.
INS Kalvari (S23) was the lead vessel of the Kalvari class of diesel-electric submarines of the Indian Navy. It was the first ever submarine inducted into service by the Indian Navy. The submarine was laid down on 27 December 1966 as Foxtrot-class submarine B-51 of the Soviet Navy by Novo-Admiralty at Galerniy Island, Leningrad.
INS Khanderi (S22) was a Kalvari-class diesel-electric submarine of the Indian Navy.
INS Kursura (S20) was a Kalvari-class diesel-electric submarine of the Indian Navy. It was India's fourth submarine. Kursura was commissioned on 18 December 1969 and was decommissioned on 27 February 2001 after 31 years of service. It participated in the Indo-Pakistani War of 1971, where it played a key role in patrol missions. It later participated in naval exercises with other nations and made many goodwill visits to other countries.
INS Vagir (S41) was a Vela-class diesel-electric submarine of the Indian Navy.
Soviet submarine B-405 may refer to one of the following submarines of the Soviet Navy:
INS Karanj may refer to the following vessels of the Indian Navy:
INS Kalvari (S21) is the first of the six indigenous Kalvari-class submarines currently in service with the Indian Navy. It is a diesel-electric attack submarine which is designed by DCNS and was manufactured at Mazagon Dock Limited in Mumbai.
Ghazi is a 2017 Indian war film written and directed by Sankalp Reddy. The film is produced in the Telugu film industry, and is shot simultaneously in Telugu and Hindi languages, with the latter titled The Ghazi Attack. The film stars Kay Kay Menon, Atul Kulkarni, Rana Daggubati, Taapsee Pannu and Satya Dev. The film grossed over ₹620 million (US$7.4 million) on a budget of ₹150 million (US$1.8 million).
INS Khanderi (S22) is the second of the Indian Navy's six Kalvari-class submarines being built in India. It is a diesel-electric attack submarine which was designed by French naval defence and energy company DCNS and manufactured at Mazagon Dock Limited in Mumbai.
INS Karanj (S23) is the third submarine of the first batch of six Kalvari-class submarines for the Indian Navy. It is a diesel-electric attack submarine based on the Scorpène class, designed by French naval defence and energy group DCNS and manufactured by Mazagon Dock Limited, an Indian shipyard in Mumbai. The submarine was launched on 31 January 2018, delivered to Indian Navy on 15 February 2021, commissioned on 10 March 2021 in Mumbai in presence of Chief of Naval Staff Admiral Karambir Singh and Admiral VS Shekhawat (retd.).
INS Vela (S24) is the fourth submarine of the first batch of six Kalvari-class submarines for the Indian Navy. It is a diesel-electric attack submarine based on the Scorpène class, designed by French naval defence and energy group DCNS and manufactured by Mazagon Dock Limited, an Indian shipyard in Mumbai. The first cutting of steel for the submarine began on 14 July 2009, and the ship was launched on 6 May 2019.
INS Vagir (S25) is the fifth submarine of the first batch of six Kalvari-class submarines for the Indian Navy. It is a diesel-electric attack submarine based on the Scorpène class, designed by French naval defence and energy group Naval Group and manufactured by Mazagon Dock Limited, an Indian shipyard in Mumbai, Maharashtra.
Rear Admiral Arun Auditto, AVSM, NM was a Flag Officer in the Indian Navy. He was decorated with a gallantry award during the Liberation of Goa. A pioneer submariner in the Indian Navy, he was the commissioning Commanding Officer of the Kalvari-class submarine INS Kursura (S20), which he commanded during the Indo-Pakistani War of 1971. He later commanded the submarine base INS Virbahu and the Whitby-class frigate INS Trishul (F143). After promotion to flag rank, he served as the Fortress Commander, Andaman and Nicobar Islands (FORTAN) and as the first Flag Officer Submarines, before retiring in 1988.
INS Vagsheer (S26) is the sixth submarine of the first batch of six Kalvari-class submarines for the Indian Navy. It is a diesel-electric attack submarine based on the Scorpène class, designed by French naval defence and energy group Naval Group and manufactured by Mazagon Dock Limited, an Indian shipyard in Mumbai, Maharashtra. The ship was launched on 20 April 2022.
India
