Feature 3 | DESTROYERS, FRIGATES & CORVETTES


The first of the quartet of Project 28 Kamorta class ASW corvettes is due to be delivered in 2012.


Tese circa 2500tonne corvettes have


a length of 109.1m, a beam of 14.17m and a draught of 3.7m. The hull and superstructure are made of locally developed DMR-249A high-tensile steel. Te last two hulls will be fitted with a Kockums/ TKMS-supplied composite superstructure in a bid to reduce topside weight and reduce the RCS.


CODAD powerplant The CODAD powerplant uses four Pielstick/ MAN 12PA6 STC diesels to drive two controllable pitch propellers (CPPs) through two Renk gearboxes. Each gearbox, which is connected to two diesels, has a ‘twin output’ and ‘single input’ mode. Top speed is 28knots. Hull stabilizers are fitted. Electrical power is provided by a pair of Wärtsilä diesels alternators each rated at 1000kW and two 500kW Kirloskar Cummins units. The ships have modular accomm-


odation and a total atmospheric control system for operating in nuclear, biological, chemical (NBC) environments. Te helicopter traversing system was supplied by McTaggart Scott in the UK. Te corvettes also have a high degree of


automation. A shipboard ATM Ethernet fibre-optic network, the AISDN, ties


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together all shipboard control systems, the CCS Mk 3 communications system, the navigation system and the CMS-28 combat management system. L3-MAPPS supplied the integrated system and the


bridge integrated


platform management system, as well as the Personnel Location System (PLS)


“The ships have around 85% local content – a figure that is considerably greater than previous Indian warship projects”


which allows on-board personnel to be tracked and managed efficiently under all conditions and especially during casualty and battle damage scenarios. The armament includes a license-


built Oto Melara 76/62 Super rapid gun in a stealth turret, two license-built AK 630M Gatling guns along with what is likely to be the Barak 1 point defence


missile system. The anti-submarine warfare suite comprises two Indigenous Rocket Launchers (IRLs) – an improved version of the Russian RBU 6000 and two Indigenous Torpedo Tube Launchers (ITTLs) – a similar development of the Russian DTA-53 533mm heavy-weight torpedo launcher. Te ITTLs are fired through hull openings. Larsen and Toubro supply both weapons. A bow-mounted HUMSA-NG sonar,


enclosed in a composite dome supplied by TODS UK, as well as a ‘Nagin’ towed array unit are controlled by the locally developed IAC Mod C system. A Sea King or equivalent 10tonne medium helicopter can be embarked for prosecuting submarines at longer ranges. Te main search and target acquisition


radar is the locally developed Revathi 3-D unit. Fire control is by two BEL-supplied Lynx U1 directors as well as an unspecified optronic director. Te electronic warfare suite comprises a BEL Sanket system along with four CSN-56 Kavach decoy launchers. As of late 2010, the planned delivery


dates for the vessels were mid-2012, March 2013, March 2014 and January 2015. Another eight follow-on corvettes, in two batches of approved.WT


four, have been Warship Technology May 2011


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