Arihant-class submarine

	INS Arihant, lead vessel of the class
Class overview
Name	Arihant
Builders	Navy Shipbuilding Centre, Visakhapatnam
Operators	Indian Navy
Succeeded by	S5-class submarine
Cost	₹40 billion (US$480 million) per submarine
In commission	2016–present
Planned	4
Building	2
Completed	2
Active	2
General characteristics
Type	Nuclear powered ballistic missile submarine
Displacement	Arihant & Arighat: 6,000 t (5,900 long tons; 6,600 short tons) surfaced; S4 & S4*: 7,000 t (6,900 long tons; 7,700 short tons);
Length	Arihant & Arighat: 111 m (364 ft); S-4: 130 m (430 ft)
Beam	11 m (36 ft)
Draft	15 m (49 ft)
Propulsion	1 x CLWR-B1 pressurized water reactor (83 MW); 1 × shaft;
Speed	Surfaced: 12–15 kn (22–28 km/h); Submerged: 24 kn (44 km/h);
Range	Unlimited except by food supplies
Test depth	300 m (980 ft)
Complement	95
Sensors and ; processing systems	USHUS sonar
Armament	Arihant & Arighat: 12 × K15 SLBM (1,500 km or 930 mi range) or 4 × K-4 SLBM (3,500 km or 2,200 mi range); S4 & S4*: 24 × K15 SLBM (750 km or 470 mi range) or 8 × K-4 SLBM (3,500 km or 2,200 mi range) or 8 × K-5 SLBM (5,000–6,000 km or 3,100–3,700 mi range); 6 × 21" (533 mm) torpedo tubes – est 30 charges (torpedoes, cruise missiles or mines);

The Arihant-class (transl. 'Slayer of Enemies' in Sanskrit) is a class of Indian nuclear-powered ballistic missile submarines being built for the Indian Navy. They were developed under the ₹900 billion (US$11 billion) Advanced Technology Vessel (ATV) project to design and build nuclear-powered submarines.^[1] These vessels are classified as 'strategic strike nuclear submarines' by India.^[13]^[14]

The lead vessel of the class, INS Arihant was laid down in 2004, launched in 2009 and after extensive sea trials was confirmed to be commissioned in August 2016.^[15]^[16]^[17] Arihant holds the distinction of being the first ballistic missile submarine to have been built by a country other than one of the five permanent members of the United Nations Security Council.^[18]

^ ^a ^b "A peek into India's top secret and costliest defence project, nuclear submarines". India Today. 7 December 2017. Archived from the original on 11 December 2017. Retrieved 11 December 2017.
^ "Contract worker killed in accident at navy ship building centre". The Hindu. 8 March 2014. Archived from the original on 14 March 2014. Retrieved 17 March 2016.
^ "Why India needs submarines". The Diplomat. May 2016. Archived from the original on 17 May 2016. Retrieved 17 May 2016.
^ "India reaches milestone with launch of n-powered submarine". DNA. 26 July 2007. Archived from the original on 13 June 2016. Retrieved 24 January 2011.
^ ^a ^b ^c Cite error: The named reference India Today3 was invoked but never defined (see the help page).
^ "Founder's Day Speech, Director, BARC" (PDF). Bhabha Atmoic Research Centre. 30 October 2018. Retrieved 21 March 2021.
^ "DAE (Excellence in Science, Engineering & Technology) Awards 2010" (PDF). BARC Newsletter (322): 33. September–October 2011. Archived from the original (PDF) on 15 May 2013. Retrieved 21 March 2021.
^ ^a ^b Cite error: The named reference toi-ntriad was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference NuclearArm was invoked but never defined (see the help page).
^ "H I Sutton - Covert Shores".
^ "DRDO on long range Pralay, K5 to stalemate China soon". THE NEW INDIAN EXPRESS. Retrieved 15 December 2018.
^ Pike, John (27 July 2009). "Advanced Technology Vessel (ATV)". globalsecurity.org. Archived from the original on 29 August 2011. Retrieved 24 January 2011.
^ "Prime Minister felicitates crew of INS Arihant on completion of Nuclear Triad". Press Information Bureau, Government of India. 5 November 2018. Retrieved 15 September 2019.
^ "INS Arihant completes India's nuclear triad, PM Modi felicitates crew". The Economic Times. 6 November 2018. Retrieved 15 September 2019.
^ Cite error: The named reference :2 was invoked but never defined (see the help page).
^ Ashish Singh (17 October 2016). "What is INS Arihant?". NewsX. Archived from the original on 27 October 2016. Retrieved 30 October 2016.
^ "India's first nuclear submarine INS Arihant ready or operations, passes deep sea tests". The Economic Times. 23 February 2016. Archived from the original on 24 February 2016. Retrieved 23 February 2016.
^ Marcus, Jonathan (10 August 2013). "Indian-built Arihant nuclear submarine activated". BBC. Archived from the original on 12 October 2013. Retrieved 12 October 2013.

[India_Today-1] "A peek into India's top secret and costliest defence project, nuclear submarines". India Today. 7 December 2017. Archived from the original on 11 December 2017. Retrieved 11 December 2017.

[2] "Contract worker killed in accident at navy ship building centre". The Hindu. 8 March 2014. Archived from the original on 14 March 2014. Retrieved 17 March 2016.

[3] "Why India needs submarines". The Diplomat. May 2016. Archived from the original on 17 May 2016. Retrieved 17 May 2016.

[dna-launch-4] "India reaches milestone with launch of n-powered submarine". DNA. 26 July 2007. Archived from the original on 13 June 2016. Retrieved 24 January 2011.

[India_Today3-5] Cite error: The named reference India Today3 was invoked but never defined (see the help page).

[CLWR-B1-6] "Founder's Day Speech, Director, BARC" (PDF). Bhabha Atmoic Research Centre. 30 October 2018. Retrieved 21 March 2021.

[clwr_barc-7] "DAE (Excellence in Science, Engineering & Technology) Awards 2010" (PDF). BARC Newsletter (322): 33. September–October 2011. Archived from the original (PDF) on 15 May 2013. Retrieved 21 March 2021.

[toi-ntriad-8] Cite error: The named reference toi-ntriad was invoked but never defined (see the help page).

[NuclearArm-9] Cite error: The named reference NuclearArm was invoked but never defined (see the help page).

[10] "H I Sutton - Covert Shores".

[THE_NEW_INDIAN_EXPRESS-11] "DRDO on long range Pralay, K5 to stalemate China soon". THE NEW INDIAN EXPRESS. Retrieved 15 December 2018.

[12] Pike, John (27 July 2009). "Advanced Technology Vessel (ATV)". globalsecurity.org. Archived from the original on 29 August 2011. Retrieved 24 January 2011.

[:5-13] "Prime Minister felicitates crew of INS Arihant on completion of Nuclear Triad". Press Information Bureau, Government of India. 5 November 2018. Retrieved 15 September 2019.

[:6-14] "INS Arihant completes India's nuclear triad, PM Modi felicitates crew". The Economic Times. 6 November 2018. Retrieved 15 September 2019.

[:2-15] Cite error: The named reference :2 was invoked but never defined (see the help page).

[:0-16] Ashish Singh (17 October 2016). "What is INS Arihant?". NewsX. Archived from the original on 27 October 2016. Retrieved 30 October 2016.

[Arihant_ready-17] "India's first nuclear submarine INS Arihant ready or operations, passes deep sea tests". The Economic Times. 23 February 2016. Archived from the original on 24 February 2016. Retrieved 23 February 2016.

[bbc2-18] Marcus, Jonathan (10 August 2013). "Indian-built Arihant nuclear submarine activated". BBC. Archived from the original on 12 October 2013. Retrieved 12 October 2013.

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Class overview
INS Arihant, lead vessel of the class
Name	Arihant
Builders	Navy Shipbuilding Centre, Visakhapatnam^[2]
Operators	Indian Navy
Succeeded by	S5-class submarine
Cost	₹40 billion (US$480 million) per submarine^[1]
In commission	2016–present
Planned	4
Building	2^[3]
Completed	2
Active	2
General characteristics
Type	Nuclear powered ballistic missile submarine
Displacement	Arihant & Arighat: 6,000 t (5,900 long tons; 6,600 short tons) surfaced^[4] S4 & S4*: 7,000 t (6,900 long tons; 7,700 short tons)^[5]
Length	Arihant & Arighat: 111 m (364 ft);^[9] S-4: 130 m (430 ft)^[9]^[10]
Beam	11 m (36 ft)^[9]
Draft	15 m (49 ft)^[9]
Propulsion	1 x CLWR-B1 pressurized water reactor^[6]^[7]^[8] (83 MW) 1 × shaft
Speed	Surfaced: 12–15 kn (22–28 km/h) Submerged: 24 kn (44 km/h)
Range	Unlimited except by food supplies
Test depth	300 m (980 ft)
Complement	95
Sensors and processing systems	USHUS sonar
Armament	Arihant & Arighat: 12 × K15 SLBM (1,500 km or 930 mi range) or 4 × K-4 SLBM (3,500 km or 2,200 mi range)^[8]^[5] S4 & S4*: 24 × K15 SLBM (750 km or 470 mi range) or 8 × K-4 SLBM (3,500 km or 2,200 mi range)^[5] or 8 × K-5 SLBM (5,000–6,000 km or 3,100–3,700 mi range)^[11] 6 × 21" (533 mm) torpedo tubes – est 30 charges (torpedoes, cruise missiles or mines)^[12]