FOXTROT CLASS

Vessel Type: Submarine, Type 641.
Names & Pennant Numbers with commission dates:
INS Vela S40 (31 August 1973) - Undergoing Refit
INS Vagli S42 (10 August 1974) - Refit Complete
Names & Pennant Numbers with commission dates:
Kalvari S23 (08 December 1967) - decommissioned on 31 May 1996
Khanderi S22 (06 December 1968) - decommissioned on 18 October 1989
Karanj S21 (04 September 1969) - decommissioned on 01 August 2003
Kursura S20 (18 December 1969) - decommissioned on 27 September 2001
Vagir S41 (03 November 1973) - decommissioned on 07 June 2001
Vagsheer S43 (26 December 1974) - decommissioned on 30 April 1997
Displacement: Submerged; 1950 tons.
....................Dived; 2475 tons.
Dimensions: Length - 91.3 metres.
................Beam - 7.5 metres.
................Draught - 6 metres.
Diving Depth: 250 meters (820 feet), reducing with age.
Main Machinery: Has three Type 37-D diesel electric generator sets with 6000 hp. Also has 3 motors which give 5400 hp. Has 3 shafts and 1 auxiliary motor with 140 hp.
Maximum Speed: Surfaced; 16 knots.
.......................Dived; 15 knots.
Maximum Range: 20,000 miles at 8 knots surfaced
.......................380 miles at 10 knots dived.
Complement: 75 (incl. 8 Officers).
Radar: Surface; One MRP-25 (NATO: Snoop Tray) radar at I-band frequency.
Sonar: One Hercules bow mounted sonar, passive search & attack with medium frequency.
..........One Fenik sonar, passive search & attack.
Weapons: Ten 533mm torpedo tubes (6 forward, 4 aft), with 22 SET-65E/SAET-60 active or passive homing torpedoes to 8.1n miles; 15 km at 40 knots. Carries 44 mines, in lieu of torpedoes.
Countermeasures: ESM; Stop Light - radar warning.
Comments: INS Vela is part of the 8th Submarine Squadron based at Vizag, while the INS Vagli is based at Mumbai. INS Vela is undergoing a refit, which may not be completed. A media report (The Hindu), dated 17 December 2006, stated that INS Vagli successfully completed her diving trials in late 2006, after a medium refit at the Hindustan Shipyard Limited at Vizag. The refit involved hull refurbishment and installation of main & auxiliary machinery and systems. The Karanj served as trials platform for the ATV command systems including the 'Rani' and 'Pachendriya' radar/sonar equipment. With her decommissioning on 01 August 2003, it is unsure which of the two remaining Foxtrot Class boats - if ever - will take over as the trials platform for the ATV's systems. The Kalvari and Kursura have been converted into submarine museums, based at Vizag.