Credit
Indian Navy · CC BY 2.5 in · Resized · CC BY 2.5 in · Source ↗ · Modified
FORCETALLY
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At a glance
Kalvari-class submarine (2015)larger figure on 0 of 3
Oscar-class submarinelarger figure on 3 of 3
Measured figures
Length
Single source67.5 m (221 ft 5 in)[source]
maximum
Single sourceConfiguration
| Specification | Kalvari-class submarine (2015) | Oscar-class submarine |
|---|---|---|
| Power | — | 2 × pressurized water cooled reactors, HEU ≤ 45%[source] 2 × steam turbines delivering 73,070 kW (97,990 shp) to two shafts[source] |
| Name | Kalvari class[source] | Oscar II class[source] |
| Builders | Mazagon Dock Limited[source] | Sevmash[source] |
| Operators | Indian Navy[source] |
Counts only measures both sources give with the same scope. A larger figure is not a better system.
155 m (508 ft 6 in) maximum[source]
Submerged
Single sourceSurfaced
Single sourceSurfaced : 1,615 tonnes (1,589 long tons) Submerged : 1,775 tonnes (1,747 long tons)[source]
Submerged · source measurement 3
Single sourceSubmerged · source measurement 4
Single sourceMaximum; Submerged
Single sourceMaximum; Surfaced
Single sourceSurfaced : 11 knots (20 km/h; 13 mph) Submerged : 20 knots (37 km/h; 23 mph)[source]
Maximum; Submerged
Single sourceMaximum; Surfaced
Single sourceat 4 kn (7.4 km/h; 4.6 mph) (submerged)
Single sourceat 8 kn (15 km/h; 9.2 mph) (surfaced)
Single source6,500 nmi (12,000 km; 7,500 mi) at 8 kn (15 km/h; 9.2 mph) (surfaced) 550 nmi (1,020 km; 630 mi) at 4 kn (7.4 km/h; 4.6 mph) (submerged)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
Soviet Navy Russian Navy[source] |
| Preceded by | Sindhughosh class Shishumar class[source] | Papa class Charlie class[source] |
|---|
| Succeeded by | Project 75I[source] | Yasen class[source] |
|---|
| Cost | ₹ 23,652 crore (equivalent to ₹ 340 billion or US$3.5 billion in 2023) for six units ₹ 3,942 crore (equivalent to ₹ 57 billion or US$590 million in 2023) per unit (FY 2016)[source] | — |
|---|
| In commission | 2017 – present[source] | 1980–present[source] |
|---|
| Planned | 20 (2 949, 18 949A)[source] |
|---|
| Completed | 14 (2 949, 11 949A, 1 09852)[source] |
|---|
| Canceled | 6 (2 incomplete, 4 never laid down)[source] |
|---|
| Active | 6 (modernization of some boats to 949AM)[source] |
|---|
| Type | Attack submarine[source] | Nuclear-powered cruise missile submarine[source] |
|---|
| Propulsion | 4 x MTU 12V 396 SE84 diesel engines 360 x battery cells DRDO PAFC Fuel Cell AIP (expected to be added in Fleet I submarines from September 2025 onwards)[source] | — |
|---|
| Endurance | 50 days[source] | 120 days[source] |
|---|
| Test depth | 350 metres (1,150 ft)[source] | 600 m[source] |
|---|
| Electronic warfare & decoys | C303/S anti-torpedo countermeasure system[source] | — |
|---|
| Armament | 6 × 533 mm (21 in) weapon launching tubes . 18 charges for SUT torpedo or SM39 Exocet AShM OR 30 naval mines[source] | 4 × 533 mm (21.0 in) and 2 × 650 mm (26 in) torpedo tubes in bow 28 × 533 mm and 650 mm weapons, including RPK-2 Vyuga (SS-N-15 Starfish) anti-submarine missiles with 15 kt nuclear warheads and RPK-6 Vodopad/RPK-7 Veter (SS-N-16) anti-submarine missiles with 200 kt nuclear warhead or Type 40 anti-submarine torpedo or 32 ground mines 24 × P-700 Granit (SS-N-19 Shipwreck) cruise missiles with 750 kilograms (1,650 lb) HE or 6 × 100 Mt Poseidon nuclear-powered, nuclear-armed drones[source] |
|---|
| Country of origin | India[source] | Soviet Union[source] |
|---|
| Built | — | 1975–2022, may be restarted[source] |
|---|
| Laid up | — |
|---|
| Lost | — |
|---|
| Retired | — | 5?[source] |
|---|
| Alternative designation | — | Oscar II[source] |
|---|
Surfaced · source measurement 1
Single sourceSurfaced · source measurement 2
Single source12,500/14,700 tonnes surfaced 16,500/19,400 tonnes submerged[source]
15 knots (28 km/h; 17 mph) surfaced 32 knots (59 km/h; 37 mph) submerged[source]