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| Deepak-class fleet tanker | |
|---|---|
| Name | Deepak-class fleet tanker |
| Type | Replenishment oiler |
| Operator | Indian Navy |
| Builders | Mazagon Dock Shipbuilders Limited |
| Laid down | 2006 |
| Launched | 2009 |
| Commissioned | 2011–2012 |
| Displacement | 27,500 tonnes (full load) |
| Length | 175 m |
| Beam | 25 m |
| Propulsion | Diesel engines, twin shafts |
| Speed | 20 knots |
| Complement | ~150 |
| Capacity | Fuel oil, aviation fuel, dry stores, water |
| Armament | Close-in weapon systems, machine guns (varies) |
| Aircraft | Aviation facilities for helicopters |
Deepak-class fleet tanker is a class of replenishment oilers built for the Indian Navy to provide underway replenishment, logistic support, and limited humanitarian assistance capabilities. The class was designed and constructed to enhance the Indian Navy's blue-water sustainment, enabling extended deployments with Eastern Naval Command, Western Naval Command, and multinational task groups. Commissioned in the early 2010s, these ships play a continuous role in fleet logistics, multinational exercises, and regional maritime diplomacy.
The class was designed to meet operational requirements outlined by the Indian Navy and incorporates features influenced by designs from Damen Shipyards Group and indigenous adaptations by Mazagon Dock Shipbuilders Limited. Hull form and propulsion are configured for sustained transit across regions frequented by the Indian Navy, including the Indian Ocean Region, Bay of Bengal, and Arabian Sea. Each ship displaces approximately 27,500 tonnes at full load, measures about 175 metres in length with a beam near 25 metres, and reaches speeds up to 20 knots—sufficient to operate alongside fast combatants such as Kolkata-class destroyer and Shivalik-class frigate formations.
A broad range of cargo systems supports fuel transfer, fresh water, and food stores. Replenishment-at-sea (RAS) rigs are installed to facilitate connected replenishment (CONREP) and alongside fueling of surface combatants; aviation facilities include a flight deck and hangar to operate multi-role helicopters like the Westland Sea King and HAL Dhruv derivatives. Survivability is enhanced by damage control systems, firefighting suites, and close-in weapon systems (CIWS) for point defence, while sensor fit enables navigation and tactical situational awareness used in exercises with allies such as United States Navy and French Navy.
Construction was undertaken at Mazagon Dock Shipbuilders Limited yards in Mumbai, with steel procurement, outfitting, and systems integration coordinated between national suppliers and international partners. The programme began following a solicitation for replenishment vessels to replace older auxiliaries, with keel-laying and modular construction methods reflecting contemporary naval shipbuilding practices used by shipyards like Navantia and Daewoo Shipbuilding & Marine Engineering for similar classes.
Development involved collaboration with indigenous design bureaux and naval architects to meet the Indian Navy's logistics doctrine; systems integration covered fuel handling, cargo management, and aviation support. Commissioning ceremonies attracted senior officials from Ministry of Defence (India) and were attended by flag officers from Indian Navy, reflecting the strategic priority assigned to fleet sustainment. Post-commissioning trials included sea acceptance trials and replenishment drills with units from Eastern Fleet.
Since entering service, vessels of the class have participated in multinational exercises, logistic support missions, and humanitarian assistance/disaster relief (HADR) deployments. They have conducted replenishment operations alongside task groups during exercises such as MALABAR and bilateral visits with navies from Japan Maritime Self-Defense Force, Royal Navy, and United States Navy. The class has supported carrier battle group transits, including deployments with INS Vikramaditya and surface action groups operating in the Indian Ocean Region.
In HADR roles, ships have delivered fuel, potable water, and relief consignments during crises affecting regional partners, cooperating with agencies like National Disaster Response Force and international bodies. Operational deployments have extended to the Gulf of Aden for escort and sustainment tasks and included goodwill port calls to nations along the East African coast and Southeast Asia.
- The lead ship, commissioned in 2011, bears a pennant aligned with Indian Navy auxiliary numbering and entered service after sea trials and acceptance. - The second ship, commissioned in 2012, followed a similar build schedule and complements the class in rotational deployments and logistics cycles. (Ship names and pennant numbers are designated by the Indian Navy and listed in official fleet registers maintained by the Ministry of Defence (India) and naval publications.)
Primary roles include underway replenishment of fuel, lubricants, and aviation fuel to surface combatants and aviation assets; secondary roles encompass transportation of dry stores, spares, and freshwater. The class supports carrier strike group operations, anti-piracy patrol sustainment, and maritime security patrols by providing extended endurance to combatants such as Kora-class corvette and Talwar-class frigate. Aviation facilities enable vertical replenishment (VERTREP) using helicopters like the HAL Dhruv and Westland Sea King, enhancing logistic flexibility in littoral and open-ocean environments.
Medical and workshops aboard permit limited casualty treatment and engineering repairs, useful during HADR missions and cooperative engagements with coast guards and navies, including the Maldives National Defence Force and Sri Lanka Navy.
Modernisation efforts focus on improved fuel management systems, automation for cargo handling, and integration of contemporary communication suites compatible with standards used by coalition partners such as the North Atlantic Treaty Organization. Plans include retrofitting for enhanced self-defence sensors and electronic warfare support to better operate in contested littoral zones and to interface with tactical networks used by carrier and destroyer groups. Incremental upgrades follow lessons learned from exercises with the United States Navy and Royal Australian Navy to ensure interoperability during joint operations and maritime security initiatives.
Category:Auxiliary ships of the Indian Navy