The Shivalik-class (Project 17) are multi-role stealth frigates built for the Indian Navy by Mazagon Dock Shipbuilders Limited, and hold the distinction of being the first warships designed and built in India with dedicated low-observability (stealth) features. Three ships were built — INS Shivalik, INS Satpura, and INS Sahyadri — all commissioned between 2010 and 2012, and the class went on to directly inform the design of the larger, more advanced Nilgiri-class (Project 17A) that followed.[1]
Project 17 was conceived in the 1990s to give India a class of frigates combining better stealth and land-attack capability than the preceding Russian-designed Talwar-class frigates then entering service, while also being fully designed and constructed in India rather than imported. The first three ships were formally ordered in early 1999, marking a deliberate shift toward indigenous frigate design rather than continued reliance on Russian yards.[2]
Construction, which began in 2000, was slowed by several distinct problems: delayed finalisation of weapons-suite design inputs from the Naval Design Bureau, changes to hull steel specifications mid-programme, and delivery delays of high-strength D-40S steel that was originally to be sourced from Russia.[3] To resolve the steel bottleneck, DRDO and the Steel Authority of India jointly developed an indigenous AB-grade steel suitable for warship hulls, a development that subsequently benefited later Indian warship classes as well. Separately, in March 2009 the lead ship INS Shivalik faced additional delay when General Electric was unable to secure U.S. government export permission in time to install the ship’s gas turbine engines, illustrating the geopolitical risk of relying on foreign-sourced propulsion for a frontline combatant.[3] All three ships were nonetheless in commission by 2012, roughly a decade after construction began.
As India’s first indigenously designed stealth warships, the Shivalik-class incorporates structural shaping to reduce radar cross-section, thermal signature-reduction measures to lower infrared detectability, and acoustic quieting to reduce the ship’s underwater noise signature against sonar detection — a combination of measures that set the design template later refined on the Nilgiri-class.[1]
The class carries an eight-cell vertical launch system for anti-ship cruise missiles, capable of housing either the Russian 3M-54 Klub (SS-N-27) missile or the Indo-Russian PJ-10 BrahMos supersonic cruise missile, giving the ships a substantial long-range strike capability against both ships and land targets.[4]
For area air defence, the class carries a rail-launched Shtil-1 (SA-N-12) surface-to-air missile system with 24 missiles mounted forward of the anti-ship VLS, supplemented by 32 vertically launched Israeli Barak-1 short-range surface-to-air missiles aft of the ship’s stack for point and short-range defence — a layered air-defence approach later superseded on the Nilgiri-class, which drops the Shtil system entirely in favour of longer-ranged Barak-8 missiles across all launch cells.[4]
The ships mount a 76mm dual-purpose gun forward for surface and air engagements, plus two six-barrelled AK-630 30mm close-in weapon systems located near the Barak-1 launchers for last-ditch defence against incoming missiles and aircraft.[4]
Each ship has a landing deck and hangar capable of embarking two Sea King Mk 42-sized helicopters (or similarly sized types such as the more modern MH-60R), extending the frigates’ surveillance and anti-submarine reach well beyond the ship’s own sensor and weapons range.[5]
Since entering service, Shivalik-class frigates have served as multi-mission escorts and independent patrol platforms, taking part in numerous multinational exercises including Malabar, RIMPAC, and bilateral drills with regional navies, and providing anti-submarine, anti-air, and anti-surface capability across both the Eastern and Western fleets over more than a decade of service.[1]
The Shivalik-class’s stealth shaping, construction lessons, and weapons integration experience directly shaped the design of the follow-on Nilgiri-class (Project 17A), which retains the same broad multi-role frigate concept while improving displacement, automation, indigenous content, and air-defence range — making Project 17 a foundational programme in India’s modern stealth-warship design lineage.[6]
Beyond their individual combat value, the Shivalik-class ships marked India’s transition from licence-building or importing frigate designs to independently designing a modern stealth warship from the keel up — an important milestone that gave Indian shipyards and the Naval Design Bureau confidence and experience subsequently applied across the Kolkata, Visakhapatnam, and Nilgiri-class programmes.[2]
| Type | Multi-Role Stealth Guided-Missile Frigate |
| Ships | INS Shivalik, INS Satpura, INS Sahyadri |
| Strike Armament | 8-cell VLS: Klub or BrahMos cruise missiles |
| Air Defence | Shtil-1 SAM (24 missiles) + Barak-1 VLS (32 missiles) |
| Guns | 1 × 76mm, 2 × AK-630 CIWS |
| Aviation | Hangar/deck for 2 helicopters |
| Commissioned | 2010–2012 |
| Builder | Mazagon Dock Shipbuilders Limited |