History
The Niterói Class Frigates were designed and built by the British shipyard Vosper Thornycroft in the 1980s. These ships were designated Mk 10 by Vosper Thornycroft and are the largest of a series of ships built by that shipyard for both foreign buyers and the Royal Navy.
All of them were extensively modernized between 1996 and 2005 under the 'ModFrag' program. The projected completion was 2001. But due to lack of funds and sea trials to verify the new software, the entire program had been slipped to 2005.
A total of six ships were built, four of an anti submarine version built in England. 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.
Read more about this topic: Niteroi Class Frigate
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