INS Arisudan
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 A conceptual drawing representing the Arihant Stretch design | |
| History | |
|---|---|
 India | |
| Name | INS Arisudan |
| Builder | Shipbuilding Centre (SBC), Visakhapatnam, India[1] |
| Laid down | 2018[2] |
| Launched | 16 October 2024 [3] |
| Status | Sea trials underway |
| General characteristics | |
| Class & type | Arihant-class submarine |
| Type | Nuclear ballistic missile submarine |
| Displacement | 7,000 tonnes |
| Length | 130 m |
| Beam | 11 m |
| Draft | 9.5 m |
| Installed power | 1 x CLWR-B1 Compact Light-water reactor,[4][5] 83 MW[6] |
| Propulsion | 1 × propeller shaft, nuclear propulsion |
| Speed | Surfaced: 12–15 knots (22–28 km/h) Submerged: 24 knots (44 km/h) |
| Range | Unlimited except by food supplies |
| Endurance | Unlimited except by food supply and maintenance |
| Test depth | Between 300 m (980 ft) to 400 m (1,300 ft) |
| Sensors & processing systems |
|
| Armament |
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INS Arisudan (SSBN 83) (lit. 'Slayer of foes') is a nuclear-powered ballistic missile submarine, and the fourth and final Arihant-class submarine of the Indian Navy. It is designated S4* Strategic Strike Nuclear Submarine. The 7,000-tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre in the port city of Visakhapatnam. It is an upgraded variant of the Arihant-class submarine.[9][10]
The boat will have one seven-blade propeller powered by a Compact Light Water Reactor (CLWR). It can achieve a maximum speed of 12–15 knots (22–28 km/h) when on surface and 24 knots (44 km/h) when submerged.[11][12][13] The CLWR is an upgraded form of the one that powers INS Arihant. The CLWR has exceptionally lower acoustic signature than the previous generation making it harder to detect by enemy vessels along with longer endurance.[14]
The submarine has eight VLS tubes in its hump, as compared to four on her predecessors— She can carry up to 24 K-15 Sagarika missiles (each with a range of 750 km or 470 mi), eight K-4 missiles (with a range of 3,500 km or 2,200 mi) or K-5 missiles (with range of 6,000 km or 3,700 mi).[6][15][16]
