After the fire damage in 2010, Sindhurakshak was transported to Russia on board a heavy lift ship from Visakhapatnam in June 2010 for refit, overhaul and upgrade which lasted two and a half years.
In August 2010, Sindhurakshak arrived at the Zvezdochka shipyard in Russia.
The submarine was modernised, repaired and retrofitted under Project 08773, and after the upgrade, the sea trials started in October 2012.
The upgrades included improved electronic warfare systems, an integrated weapon control system and a new cooling system, and were expected to extend the service life of the submarine by ten years.
The Club-S (3M54E1 anti-ship and 3M14E land attack) missiles, USHUS sonar, СCS-MK-2 radio communication systems and Porpoise radio-locating radar, and other safety-enhancing features were incorporated.
The submarine was handed back to the Indian Navy on 27 January 2013, after which it sailed back to India, under Commander Rajesh Ramkumar.
This was the first time an Indian submarine had navigated under ice.
After the fire damage in 2010, Sindhurakshak was transported to Russia on board a heavy lift ship from Visakhapatnam in June 2010 for refit, overhaul and upgrade which lasted two and a half years. In August 2010, Sindhurakshak arrived at the Zvezdochka shipyard in Russia. The submarine was modernised, repaired and retrofitted under Project 08773, and after the upgrade, the sea trials started in October 2012. The upgrades included improved electronic warfare systems, an integrated weapon control system and a new cooling system, and were expected to extend the service life of the submarine by ten years. The Club-S (3M54E1 anti-ship and 3M14E land attack) missiles, USHUS sonar, СCS-MK-2 radio communication systems and Porpoise radio-locating radar, and other safety-enhancing features were incorporated. The submarine was handed back to the Indian Navy on 27 January 2013, after which it sailed back to India, under Commander Rajesh Ramkumar. This was the first time an Indian submarine had navigated under ice.
INS Sindhurakshak (S63)