Dome) illuminators are used for fire control. The system can track twelve targets and engage a maximum of six tracked targets simultaneously. Last-ditch missile defence is provided by AK-630-based close-in weapon system, while Delhi and Mysore have been upgraded with an additional IAI/Rafael Barak 1 point defence missile system. Mumbai has four AK-630 rotary cannons surrounding the aft mast, which are guided by two MR-123-02 (NATO: Bass Tilt) fire-control radars. In Delhi and Mysore, the two AK-630 mounts ahead of the aft mast have each been replaced by pair of eight-cell Barak 1 vertical launch systems, for a total of 32 missiles. The missiles have a range of and use command line-of-sight guidance provided by a pair of EL/M-2221 fire-control radars that replace MR-123-02 fire-control radars on upgraded ships. A Signaal LW08 radar license produced by BEL as RAWL provides long range air search capability. The surface missile battery of Delhi class includes 16 Kh-35E Uran missiles placed in four quadruple sloped launchers. The missiles feature active radar homing and are guided by a Granit Garpun B (NATO: Plank Shave) fire-control radar. They have a maximum range of and are capable of sea skimming. The missile battery was initially intended to be eight 3M80E Moskit cruise missiles as evidenced by large blast deflectors present on the lead ship, INS Delhi. A single AK-100 gun guided by MR-184/MR-145 fire-control system (NATO: Kite Screech), which comprises T-91E radar and Kondensor electro-optical sights, is also fitted. A quintuple trainable torpedo launcher capable of firing SET 65E active/passive homing torpedo and Type 53–65 wake homing torpedo is placed in between the funnels. A pair of 12-tubed RBU-6000 213mm anti-submarine rocket launchers fitted in front of the bridge can engage submarines up to a range of . Detection is provided by BEL HUMVAD, an indigenous hull-mounted sonar with a variable depth transducer that offers better performance in the waters around India. An Indal Model 15-750 handling system manufactured by GRSE is used to deploy the variable depth sonar of HUMVAD. The final ship of the class, , is fitted with an improved ASW suite consisting of BEL HUMSA hull-mounted sonar and Thales ATAS towed array sonar. The electronic warfare suite originally consisted of BEL Ajanta Mk 2 for electronic support measures, Elettronica TQN-2 jammer and two PK-2 chaff launchers of Russian origin. The Ajanta Mk 2 system was later replaced by Ellora, which has an