The Niterói class is a series of frigates of the Brazilian Navy built by Vosper Thornycroft of the United Kingdom and Arsenal de Marinha do Rio de Janeiro based on the Type 21 frigates.

History

These frigates were designated the 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. Two of the anti-submarines (ASW) and both of the general purpose (GP) version were built in England. The remaining two ASW ships were built at the Arsenal da Marinha in Rio de Janeiro with assistance from VT. The ASW ships had an Ikara missile launcher in Y position aft of the flight deck. This was removed as part of the modernisation programme. The GP ships had a second 4.5-inch (114 mm) 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.

From 2025, the class will be gradualy replaced in "first-rank" roles by the newest Tamandaré-class frigates, the survivors will be revitalized and transferred to patrol duties in the fleet.[1]

Ships of the class

Name Hull number Builders Type
[2][3] 		Laid down
[2][3] 		Launched
[2][3] 		Commissioned
[2][3] 		Status
Niterói F40 Vosper Thornycroft ASW 8 June 1972 8 February 1974 20 November 1976 Decommissioned on 28 June 2019; awaiting disposal[4]
Defensora F41 ASW 14 December 1972 27 March 1975 3 March 1977 Active
Constituição F42 GP 13 March 1974 15 April 1976 31 March 1978 Active
Liberal F43 GP 2 May 1975 7 February 1977 18 November 1978 Active
Independência F44 Arsenal de Marinha do Rio de Janeiro ASW 11 June 1972 2 September 1974 3 September 1979 Active
União F45 ASW 11 June 1972 14 March 1975 12 September 1980 Active
Brasil U27 Training 18 September 1981 2 September 1983 21 August 1986 Active
  • Niterói
    Niterói
  • Defensora
    Defensora
  • Constituição
    Constituição
  • Independência
    Independência
  • Liberal and União
    Liberal and União
  • Aspide fired by Defensora
    Aspide fired by Defensora

References

  1. ^ "Akaer revitalizará consoles do sistema SICONTA MkII Mod. 1 de três fragatas classe Niterói". Poder Naval (in Portuguese). 31 May 2019.
  2. ^ a b c d Saunders 2002, p. 61.
  3. ^ a b c d Saunders 2002, p. 70.
  4. ^ "FOTOS: Mostra de Desarmamento da Fragata Niterói – F40". 28 June 2019.

Bibliography

  • Marinha do Brasil (Brazilian Navy)
  • Conway's All the World's Fighting Ships 1947–1995
  • Cicalesi, J.C. e Del Gaizo, Cesar: La Marina brasiliana oggi, RiD magazine, Chiavari, June 2006, pag. 50–55
  • Saunders, Stephen. Jane's Fighting Ships 2002–2003. Coulsdon, UK: Jane's Information Group, 2002. ISBN 0710624328.
Allikas: https://en.wikipedia.org/wiki/Niteroi_class_frigate
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