Brazilian Navy Niterói Class Frigates were built by the British shipyard Vosper Thornycroft in the 1970's. Based on the company's Mk 10 frigate design,and are the largest of a series of ships built by that shipyard for both foreign buyers and the Royal Navy ( Type 21 frigate - Amazon class).
A total of six ships were built,four are specialist antisubmarine warfare frigates and two are more general purpose. These ships had an Ikara missile launcher in Y position aft of the flight deck. This was removed as part of the modernisation programme. The remaining two general purpose ships were built at the Arsenal da Marinha no Rio de Janeiro with assistance from VT. These ships had a second 4.5 inch gun in Y position. A seventh ship was built as the navy's main training unit. The ship is identical to the other ships of the class, but is not fitted with weapons or sensors.
Displacement: 3,707 tons full load
Dimensions: 129.2 x 13.5 x 5.5 meters (424 x 44.2 x 18.2 feet)
Propulsion: 2 shafts; 4 cruise diesels, 15,000 hp, 22 knots; 2 TM3B boost gas turbines, 50,080 hp, 30 knots
Crew: 217
Radar: ASW 3 air/surf search
Sonar: EDO 610E hull, EDO 700E towed VDS
Fire Control: 2 RTN 10X
EW: Cutlass intercept, chaff, Cygnus jammer
Aviation: aft helicopter deck and hangar for 1 Lynx
Armament: 4 MM40 Exocet SSM, 2 triple SeaCat SAM, 1 114 mm DP, 2 40 mm AA, 2 triple 12.75 inch torpedo tubes, 1 375 mm ASW mortar
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