NAVYPEDIA

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Chakra 2012

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
चक्र [Chakra] (ex-К-152 Нерпа [K-152 Nerpa])	S71	518	Amur Yd, Komsomolsk-on-Amur, Russia	1993	30.6.2006	28.10.2009 // 4.4.2012	in service (2019)

Technical data

Displacement standard, t
Displacement normal, t	8167 / 10500
Length, m	110.3
Breadth, m	13.8 hull 15.4 max
Draught, m	9.88
No of shafts	1
Machinery	1 OK-9VM geared steam turbines unit, OK-650VM nuclear reactor
Power, h. p.	50000
Max speed, kts	11.2 / 33.3
Fuel, t	nuclear
Endurance, nm(kts)	practically unlimited
Armament	4 - 650 TT (0), 4 - 533 TT (36, inc. Club-S SSM), 1 x 1 Strela-3M SAM (16 9M36)
Electronic equipment	MRKP-59 Radian-U radar, MGK-540 Skat-3 sonar suite, MG-519 Arfa, MG-512 Vint-M sonars, MRP-21A ECM suite, 6 REPS-324 Shlagbaum decoy launchers, MVU-132 Omnibus CCS
Complement	73
Diving depth operational, m	480

Standard scale images

Graphics

Project history

Negotiations with Russia for a 10-year "lease with the option to buy" of a Project 971 nuclear-powered attack submarine have reportedly been under way since at least 1999. Though initially rejected by India, negotiations on the lease of up to two submarines were soon renewed between the two nations due to slippages in development and construction of the Indian ATV program. By late 2005, 300 Indian naval personnel had arrived in Russia to begin training for future service aboard the submarine Nerpa. The program suffered a major setback during November 2008 when the Nerpa was undergoing trials prior to its turnover to India. A fire extinguishing system on board the vessel malfunctioned, killing 20 Russian members of the crew and injuring many others. This placed an indefinite hold on the boat's transfer, which was not finalized until September 2011 with the submarine arriving in Indian waters during October. Submarine was reconstructed under special export project 971I before transfer: 650mm weapon all were landed, but 533mm ammunition stowage was enlarged. Wake detector wasn't installed.

Modernizations

None.

Naval service

In December 2017 Chakra suffered bad damage entering Visakhapatnam harbour and entered dock for repair.