MoD inks contract with MDL for Medium Refit of INS Shankush

The Ministry of Defence, India has signed a contract for Medium Refit with Life Certification (MRLC) of Sub-Surface Killer (SSK) Class of Submarine “INS Shankush” with M/S Mazagon Dock Shipbuilders Limited (MDL), Mumbai at an overall cost of Rs. 2725 Crores.

Shankush is a SSK Class of Submarine to be re-fitted at MDL, Mumbai.with technical cooperation from ThyssenKrupp Marine Systems.

The delivery of Submarine post MRLC will be in 2026. After completion of MRLC, INS Shankush will be combat ready and will join the active fleet of the Indian Navy with upgraded combat capability.

This project is an important step towards development of MDL as Maintenance, Repair & Overhaul (MRO) Hub for supporting the industrial ecosystem of India.

The project would involve more than 30 MSMEs and would lead to employment generation of 1200 Mandays per day for the project duration.

About INS Shankush

INS Shankush (S45) (Ray of Light) is a Shishumar-class diesel-electric submarine of the Indian Navy.

General Characteristics

Displacement: 1450 tons surfaced and 1850 tons submerged

Length: 64.4 m (211 ft)

Beam: 6.5 m (21 ft)

Draught : 6 m (20 ft)


4 × 2,400 hp (1,800 kW) diesel-electric motors

1 × Siemens 4,600 hp (3,400 kW) motor

4 × 1.8 MW (2,400 hp) Siemens alternators

1 shaft

Speed: Surfaced 11 knots (20 km/h) and Submerged 22 knots (41 km/h)

Range: Snorting 8,000 nautical miles (15,000 km) at 8 kn (15 km/h)

Test depth: Test depth 260 m (850 ft)

Complement: 40 (incl 8 officers)


14 × AEG-SUT Mod 1 wire-guided active/passive torpedoes

24 × external strap-on mines