Delhi-class destroyer

INS Delhi underway
Class overview
Name: Delhi class
Builders: Mazagon Dock Limited
Operators:  Indian Navy
Preceded by: Rajput class
Succeeded by: Kolkata class
Planned: 3
Completed: 3
Active: 3
General characteristics
Type: Guided-missile destroyer
Displacement: 6,200 tonnes (full)[1]
Length: 163 m (535 ft)
Beam: 17.4 m (57 ft)
Draught: 6.5 m (21 ft)
Propulsion:
  • 2 × M36E gas turbine plants;
  • 2 shafts;
  • 4 × DT-59 reversible gas turbines;
  • 2 × RG-54 gearboxes;
  • 64,000 shp (48,000 kW)
Speed: over 28 knots (52 km/h; 32 mph)
Range: 5,000 mi (8,000 km)
Complement: 350 (incl 40 officers)
Sensors and
processing systems:
  • 1 × MR-775 Fregat MAE air search radar
  • 1 × Bharat RAWL (Dutch Signaal LW08) surface search radar
  • 3 × MR-212/201 Vaygach-U (NATO: Palm Frond) navigation radars, JRC SATCOM
  • 1 × Bharat APSOH or HUMSA sonar
  • 1 × Garden Reach Model 15-750 variable depth sonar or 1 × Thales ATAS[2]
Armament:
  • 16 × Kh-35 Switchblade (SS-N-25) SSM (4 × quadruple KT-184 launchers)
  • 32 × Barak 1 (4 × 8 cell VLS units)
  • 2 × Shtil SAM systems (48 × Shtil-1 missiles)
  • 1 × 100 mm AK-100 gun
  • 2 × 30 mm AK-630 gatling guns
  • 2 × RBU-6000 213 mm anti-submarine mortar arrays
  • 1 × 5 533-millimetre (21 in) torpedo tubes
Aircraft carried: 2 × Sea King helicopters

The Delhi-class destroyers are guided-missile destroyers of the Indian Navy. Three ships of this class are in active service.[1]

The Delhi-class vessels are the third-largest warships to be fully designed and built in India, after the Kolkata-class destroyers and the Shivalik-class frigates. They were built at Mazagon Dock Limited in Mumbai.

Development

The development of the ship began as "Project 15" in 1977. The ships were designed indigenously and built by Mazagon Docks Limited (MDL) at a cost of Rs 7 Billion each.

The Delhi class has both Soviet and Western design influences, incorporating elements of the Sovremenny, Rajput and Kashin-II-class destroyers, and the Godavari-class frigate.

These vessels are fully fitted with flag facilities. The Delhi class is also capable of operating in a NBC environment. Radar cross-section reduction is presumed to be minimal, to the extent that some sharp angles have been flattened.

In the main air defence role, a pair of 2 3S-90 launchers – one installed forward of the bridge and the other atop the dual helicopter hangar – are fitted with the Shtil SAM system. The Shtil system consists of the Russian Shtil missile and 24 such missiles are carried in a below-decks magazine. The launchers elevate up to 70° but have a limited firing arc of 30° within the centreline. The launcher groups require a crew of 20 men and weigh about 50 tons.

The Delhi class is being upgraded with the Rafael Barak 1 point air defence missile system, which overcomes the limited firing arc of the Shtil system. It has an eight-cell vertical launch system and the missile command-to-line-of-sight (CLOS) radar guidance with a range from 500 m (1,600 ft) to 10 km (6.2 mi). The missile's maximum range is 32 km (20 mi). The ship has a surveillance capacity of over 350 km (220 mi) and can sterilise an area of 250 km (160 mi).

The ships also have a quadruple 533 mm torpedo launcher, which can also be used to launch SS-N-15 'Starfish' or possibly SS-N-16 'Stallion' ASW missiles, so is capable of hitting targets ranging from 50 km (31 mi) to 120 km (75 mi). It is also equipped with two RBU-6000 anti-submarine rocket launchers with 12 tubes. Their range is 6 km (3.7 mi) and the maximum engagement depth is 500 m (1,600 ft).

Each ship can support two helicopters, the Sea King or the HAL Dhruv. The Sea King helicopters are equipped with a Super Searcher radar and primarily used in air surveillance and anti-submarine roles. The helicopters are capable of flying four and half hours non-stop. The HAL Dhruv helicopters are primarily for utility roles. INS Delhi has a crew of approximately 30 officers and 350 sailors.

The ships are equipped with four chaff launch systems and the BEL Ajanta radar interceptor. The TQN-2 jamming system is supplied by the Italian company, Elettronica. The ship's hull mounted active search sonar capability is based on the TSM2633 by Thales Underwater Systems or the APSOH by Bharat. The Delhi class also has a variable depth sonar (VDS), Model 15-750 designed by Fathom Oceanology of Mississauga, Canada with a 15 feet (4.6 m) fish on 750 feet (230 m) of faired cable. The first VDS handling system was built by Fathom and the fish utilized a Westinghouse low frequency sonar. Fathom was acquired by Indal Canada which established subsequent manufacture of VDS handling systems by Indal and Garden Reach of India.

Ships of the class

Name Pennant Builder Laid Down Launched Commissioned Homeport Status
INS Delhi D61 Mazagon Dock Limited 12 December 1992 20 March 1995 15 November 1997 Mumbai Active
INS Mysore D60 February 1991 4 June 1993 2 June 1999 Active
INS Mumbai D62 12 December 1992 20 March 1995 22 January 2001 Active
Sea King assigned to the Indian destroyer Mumbai.

References

  1. 1 2 "IN Ships-Destroyers-Delhi Class". Indiannavy.nic.in. Retrieved 2011-12-28.
  2. ↑ "ATLAS ELEKTRONIK ACTAS Towed Sonar System selected by Indian Navy for Frigates & Destroyers". 5 December 2014.
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