INS Aridhaman

INS Aridhaman is the second Arihant-class submarine. She is the second nuclear-powered ballistic missile submarine being built by India. She is being built under the Advanced Technology Vessel (ATV) project to build indigenous nuclear submarines at the Ship Building Centre in Visakhapatnam. She is the second indigenous nuclear submarine built by India and also the second built outside the P5 nations.

Description
The Aridhaman will have a length of 112 m overall, a beam of 15 m and a draft of 10 m. She displaces 6000 t and has a diving depth of 300 m. The complement is about 95, including officers and sailors.

The boat will have one seven-blade propeller powered by an 83 MW pressurised water reactor. She can achieve a maximum speed of 12 - 15 kn when on surface and 24 kn when submerged.

The submarine has four launch tubes in its hump. She can carry up to 12 K-15 Sagarika missiles with 8 multiple independently targetable reentry vehicles (MIRV) each (with a range of 750 km), or 4 of the under-development K-4 missiles (with a range of 3500 km).

Aridhaman will be fitted with a combination of two sonar systems – USHUS and Panchendriya. USHUS is a state-of-the-art sonar meant for Kilo-class submarines. Panchendriya is a unified submarine sonar and tactical control system, which includes all types of sonar (passive, surveillance, ranging, intercept and active). It also features an underwater communications system. The hull features twin flank-array sonars and Rafael broadband expendable anti-torpedo countermeasures.

Status
Aridhaman is being built in Visakhapatnam. She is currently being outfitted and is expected to be launched by 2013 or the first quarter of 2014.