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{{Use dmy dates|date=February 2018}}
[[Image:BNS CONSTITUICAO (F 42).jpg|thumb|300px|''Constituição'' (F42)]]
{|{{Infobox ship begin}}
The '''Niterói class [[frigates]]''' are a
{{Infobox ship image
class of warships of the [[Brazilian Navy]]
|Ship image=Aspirantex_2020_(49488413213).jpg
|Ship caption=''União'' in 2020
}}
{{Infobox ship class overview
|Name=''Niterói'' class, Mk10
|Builders=[[Vosper Thornycroft]], [[Arsenal de Marinha do Rio de Janeiro]]
|Operators={{navy|Brazil}}
|Class before=
|Class after= {{sclass|Tamandaré|frigate|0}}
|Subclasses=
|Cost=
|Built range=1975–1986
|In service range=
|In commission range=
|Total ships building=
|Total ships planned=
|Total ships completed=7
|Total ships cancelled=
|Total ships active=6
|Total ships laid up=
|Total ships lost=
|Total ships retired=1
|Total ships preserved=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship type=[[Frigate]]
|Ship displacement=*3,355 tons standard
*3,707 tons full load
|Ship length={{convert|129.2|m|ftin|abbr=on}}
|Ship beam={{convert|13.5|m|ftin|abbr=on}}
|Ship height=
|Ship draught={{convert|5.5|m|ftin|abbr=on}}
|Ship draft=
|Ship power=*Two [[Rolls-Royce Olympus]] TM-3B [[gas turbine]]s ({{convert|56000|hp|kW|abbr=on}} combined)
*Four MTU 16V 956 TB91 [[diesel engine]]s ({{convert|18000|hp|kW|abbr=on}} combined)
|Ship propulsion=[[CODOG|Combined diesel or gas]], two shafts
|Ship speed=*{{convert|30|kn}} (maximum)
*{{convert|22|kn}} (diesels only)
|Ship range=*{{convert|5,300|nmi}} at {{convert|17|kn}}
*{{convert|4,200|nmi}} at {{convert|19|kn}}
*{{convert|1300|nmi}} at {{convert|28|kn}}
|Ship endurance= 45 days
|Ship complement=217
|Ship sensors=*'''Before modernization:'''
* AWS2 air search [[radar]]
* ZW-06 surface search radar
* 2 × RTN-10X fire control radar (not in F42/43)
* EDO-610E hull-mounted [[sonar]]
* EDO-700E variable-depth sonar (not in F42/43)
* Computer-Aided Action Information System (CAAIS)
*'''After modernization:'''
* RAN-20S air search radar
* Terma 'Scanter Mil' surface search radar
* 2 × RTN-30X fire control radar
* Saab EOS-400 optronic director
* upgraded EDO-610E hull mounted sonar
* SICONTA Mk 2 [[C4ISTAR|C3I]] system
|Ship EW=*'''Before modernization:'''
* RDL-2/3 [[Electronic warfare support measures|ESM]]
* Two 12 × 102{{nbsp}}mm rocket launchers
*'''After modernization:'''
* Cutlass B1W [[Electronic warfare support measures|ESM]]
* ET/SQL-1 [[Electronic countermeasure|ECM]]
* Two 12×102{{nbsp}}mm rocket launchers
|Ship armament=*'''After modernization:'''
* [[Exocet]] MM40 anti-ship missiles;
* [[Selenia Aspide|Aspide]] anti-aircraft missiles
* 1 × [[4.5 inch (114 mm) Mark 8 naval gun|Vickers 4.5-inch (113 mm) Mk 8 gun]]
* 2 × [[Bofors 40 mm Automatic Gun L/70|Bofors 40 mm Mk3 Sea Trinity]]
* 2 × triple torpedo tubes for Mk-46 torpedoes
* 4 × [[M2 Browning]] machine gun
* 1 × double-barrel [[Bofors 375mm anti submarine rockets|Bofors Boroc anti-submarine rocket launcher]]
|Ship armor=
|Ship aircraft=*[[Westland Super Lynx]] Mk.21A (locally designated as AH-11A); or
*[[AS-350|Eurocopter AS-350/355 Squirrel]] (locally assembled by Helibrás as UH-12/UH-13 'Esquilo')
|Ship aircraft facilities=Helipad and hangar
|Ship notes=
}}
|}


The '''''Niterói''-class frigates''' are a class of [[frigate]]s of the [[Brazilian Navy]].
==History==
The Niterói Class Frigates were designed and built by the British shipyard [[Vosper Thornycroft]] in the 1970's. 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 ( [[Type 21 frigate]] - Amazon class).


== History ==
All of then 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.
The ''Niterói'' class were designed and built by the British shipyard [[Vosper Thornycroft]] (VT) in the 1970s. 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 trial]]s 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)|Ikara]] missile launcher in Y position aft of the flight deck. This was removed as part of the modernisation programme.


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)|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 {{convert|4.5|in|mm|adj=on|0}} 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 2024, the class will be gradually replaced by the modern {{sclass|Tamandaré|frigate|0}} frigates, the survivors will be modernized and revitalized with the new combat system SICONTA MkII Mod. 1, developed by the Brazilian company Akaer Engenharia and transferred to patrol duties in the fleet.<ref>{{Cite news|url=https://www.naval.com.br/blog/2019/05/31/akaer-revitalizara-consoles-do-sistema-siconta-mkii-mod-1-de-tres-fragatas-classe-niteroi|title=Akaer revitalizará consoles do sistema SICONTA MkII Mod. 1 de três fragatas classe Niterói|date=31 May 2019|website=Poder Naval|language=pt}}</ref>

== Ships ==
{| class="wikitable"
{| class="wikitable"
|-
|-
! No.
! Pennant number
! Name
! Name
! Type<ref name="jfs2002 p61">Saunders 2002, p. 61.</ref>
! Launched
! Laid down<ref name="jfs2002 p61"/>
! Completed
! Launched<ref name="jfs2002 p61"/>
! Current status
! Commissioned<ref name="jfs2002 p61"/>
! Status
|-
|-
| F40
| F40
| ''Niterói''
|{{ship|Brazilian frigate|Niterói|F40|2}}
| 8/2/74
| ASW
| 8 June 1972
|20/11/76
| 8 February 1974
|In service
| 20 November 1976
| Decommissioned 28 June 2019<ref>{{Cite web|url=https://www.naval.com.br/blog/2019/06/28/fotos-mostra-de-desarmamento-da-fragata-niteroi-f40/|title=FOTOS: Mostra de Desarmamento da Fragata Niterói – F40|date=28 June 2019}}</ref>
|-
|-
| F41
| F41
| ''Defensora''
|{{ship|Brazilian frigate|Defensora|F41|2}}
| 27/3/75
| ASW
| 14 December 1972
| 5/3/77
| 27 March 1975
|In service
| 3 March 1977
| In service
|-
|-
| F42
| F42
|''Constituição''
|{{ship|Brazilian frigate|Constituição|F42|2}}
| 15/4/76
| GP
| 13 March 1974
| 31/3/78
| 15 April 1976
|In service
| 31 March 1978
| In service
|-
|-
|F43
|F43
|{{ship|Brazilian frigate|Liberal|F43|2}}
|''Liberal''
| GP
|15/4/76
| 2 May 1975
|31/3/78
| 7 February 1977
|In service
| 18 November 1978
|}
| In service

The remianing 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.
{| class="wikitable"
|-
! Pennant number
! Name
! Launched
! Completed
! Current status
|-
|-
| F44
| F44
| ''Independência''
|{{ship|Brazilian frigate|Independência|F44|2}}
| 2/9/74
| ASW
| 11 June 1972
| 3/9/79
| 2 September 1974
| 3 September 1979
| In service
| In service
|-
|-
| F45
| F45
|{{ship|Brazilian frigate|União|F-45|2}}
| ''União''
| 14/3/75
| ASW
| 11 June 1972
|17/9/80
| 14 March 1975
|In service
| 12 September 1980
| In service
|-
| U27
|{{ship|Brazilian training ship|Brasil|U27|2}}
| Training
| 18 September 1981<ref name="jfs2002 p70">Saunders 2002, p. 70.</ref>
| 2 September 1983<ref name="jfs2002 p70"/>
| 21 August 1986<ref name="jfs2002 p70"/>
| In service
|}
|}


== Gallery ==
==General Characteristics==
<gallery mode="nolines" caption="Niterói-class Frigate Gallery">

File:F Defensora (F-41) NT Almirante Gastão Motta (G-23).jpg|''Defensora'' operating with the tanker ''Almirante Gastão Motta'' on 18 November 2007.
*'''Displacement (tons):'''
File:F União (F-45).jpg|''União'' underway on 22 January 2008.
**3,355-standard
File:F42 Constituição.jpg|[[Brazilian frigate Constituição (F42)|''Constituição'']] on 2 June 2009.
**3,707-full load
File:Navio Escola Brasil (1) (5432029690).jpg|[[Brazilian training ship Brasil (U27)|''Brasil'']] under way in 2011.

File:Fragata_Independência_(32706810154).jpg|F-44 ''Independência'' and F-42 ''Constituição'' on patrol in 2017.
*'''Dimensions:
File:GLAM MB ASPIRANTEX 2018 - Fragata União (25264367907).jpg|''União'' during Aspirantex 2018.
** Length : 129.2m
File:GLAM MB ASPIRANTEX 2018 - Fragata Liberal (40103362142).jpg|''Liberal'' during Aspirantex 2018.
** Beam: 13.5m
File:GLAM_MB_ASPIRANTEX_2018_(25264360577).jpg|F-45 ''União'' at nightfall during Aspirantex 2018.
** Draught 5.5m
File:Aspirantex 2020 (49489126447).jpg| Escort to the G-40 Bahia During Aspirantex 2020.

File:Aspirantex 2020 (49489117842).jpg| F-43 ''Liberal'' and F-45 ''União'' during Aspirantex 2020.
*Machinery: 2 shaft [[CODOG]]
File:Aspirantex_2020_(49488413738).jpg| F-43 ''Liberal'' and F-45 ''União'' during Aspirantex 2020.
**2 Rols Royce Olympus gas turbines, 56000 hp
File:F43 Operação Guinex III - 2023.jpg| ''Liberal'' conducts drills with the [[Spanish Navy]]'s {{ship|Spanish patrol vessel|Tornado|P-44|2}} in the [[Gulf of Guinea]], 2023.
**4 MTU Diesels 18,000 hp


</gallery>
*Speed : 30 knots (22 knots diesels only)


==See also==
*Range: 5,300 nm - at 17 knots / 4,200-a 19 knots /1300 nm -a 28 knots, endurance 45 days
* [[List of naval ship classes in service]]
*Crew: 217 men


== References ==
*'''Armament (after the modernization):'''
** Missile antiship MM-40 [[Exocet]];
** Anti-aircraft missile ASPIDE;
** 1 [[4.5 inch (114 mm) Mark 8 naval gun|Vickers gun 4.5 inch Mk 8 (114 mm)]], (22 km range);
** 2 Cannons Antiaircraft Bofors SAK 40mm/70;
**2 x3 torpedo tubes for Mk-46 torpedoes;
**anti-submarinee rocket launcher


===Citations===
* '''Helicopter:''' 1 [[Westland]] Super Lynx Mk.21A (locally designated as AH-1A) or 1 Eurocopter AS-350/355 Squirrel (locally assembled as UH-12/UH-13 'Esquilo')
{{reflist}}


==References==
===Sources===
* [https://web.archive.org/web/20060115040529/http://www.mar.mil.br/ 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}}.


==External links==
*[http://www.mar.mil.br Marinha do Brasil (Brazilian Navy)]
* {{Commons category-inline|Niteroi class frigate}}
* Conway's All the World's Fighting Ships 1947-1995


[[Category:Niteroi class frigates| ]]
{{Niterói-class frigates}}


{{DEFAULTSORT:Niteroi-class frigate}}
[[pt:Classe Niterói]]
[[Category:Niteroi-class frigates| ]]
[[Category:Frigate classes]]
[[Category:Frigates of the Brazilian Navy]]

Latest revision as of 19:05, 23 July 2024

União in 2020
Class overview
NameNiterói class, Mk10
BuildersVosper Thornycroft, Arsenal de Marinha do Rio de Janeiro
Operators Brazilian Navy
Succeeded byTamandaré-class
Built1975–1986
Completed7
Active6
Retired1
General characteristics
TypFrigate
Displacement
  • 3,355 tons standard
  • 3,707 tons full load
Length129.2 m (423 ft 11 in)
Beam13.5 m (44 ft 3 in)
Draught5.5 m (18 ft 1 in)
Installed power
PropulsionCombined diesel or gas, two shafts
Speed
  • 30 knots (56 km/h; 35 mph) (maximum)
  • 22 knots (41 km/h; 25 mph) (diesels only)
Range
  • 5,300 nautical miles (9,800 km; 6,100 mi) at 17 knots (31 km/h; 20 mph)
  • 4,200 nautical miles (7,800 km; 4,800 mi) at 19 knots (35 km/h; 22 mph)
  • 1,300 nautical miles (2,400 km; 1,500 mi) at 28 knots (52 km/h; 32 mph)
Endurance45 days
Complement217
Sensors and
processing systems
  • Before modernization:
  • AWS2 air search radar
  • ZW-06 surface search radar
  • 2 × RTN-10X fire control radar (not in F42/43)
  • EDO-610E hull-mounted sonar
  • EDO-700E variable-depth sonar (not in F42/43)
  • Computer-Aided Action Information System (CAAIS)
  • After modernization:
  • RAN-20S air search radar
  • Terma 'Scanter Mil' surface search radar
  • 2 × RTN-30X fire control radar
  • Saab EOS-400 optronic director
  • upgraded EDO-610E hull mounted sonar
  • SICONTA Mk 2 C3I system
Electronic warfare
& decoys
  • Before modernization:
  • RDL-2/3 ESM
  • Two 12 × 102 mm rocket launchers
  • After modernization:
  • Cutlass B1W ESM
  • ET/SQL-1 ECM
  • Two 12×102 mm rocket launchers
Armament
Aircraft carried
Aviation facilitiesHelipad and hangar

The Niterói-class frigates are a class of frigates of the Brazilian Navy.

History

[edit]

The Niterói class were designed and built by the British shipyard Vosper Thornycroft (VT) in the 1970s. 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 2024, the class will be gradually replaced by the modern Tamandaré-class frigates, the survivors will be modernized and revitalized with the new combat system SICONTA MkII Mod. 1, developed by the Brazilian company Akaer Engenharia and transferred to patrol duties in the fleet.[1]

Ships

[edit]
No. Name Type[2] Laid down[2] Launched[2] Commissioned[2] Status
F40 Niterói ASW 8 June 1972 8 February 1974 20 November 1976 Decommissioned 28 June 2019[3]
F41 Defensora ASW 14 December 1972 27 March 1975 3 March 1977 In service
F42 Constituição GP 13 March 1974 15 April 1976 31 March 1978 In service
F43 Liberal GP 2 May 1975 7 February 1977 18 November 1978 In service
F44 Independência ASW 11 June 1972 2 September 1974 3 September 1979 In service
F45 União ASW 11 June 1972 14 March 1975 12 September 1980 In service
U27 Brasilien Training 18 September 1981[4] 2 September 1983[4] 21 August 1986[4] In service
[edit]
  • Niterói-class Frigate Gallery
  • Defensora operating with the tanker Almirante Gastão Motta on 18 November 2007.
    Defensora operating with the tanker Almirante Gastão Motta on 18 November 2007.
  • União underway on 22 January 2008.
    União underway on 22 January 2008.
  • Constituição on 2 June 2009.
    Constituição on 2 June 2009.
  • Brasil under way in 2011.
    Brasil under way in 2011.
  • F-44 Independência and F-42 Constituição on patrol in 2017.
    F-44 Independência and F-42 Constituição on patrol in 2017.
  • União during Aspirantex 2018.
    União during Aspirantex 2018.
  • Liberal during Aspirantex 2018.
    Liberal during Aspirantex 2018.
  • F-45 União at nightfall during Aspirantex 2018.
    F-45 União at nightfall during Aspirantex 2018.
  • Escort to the G-40 Bahia During Aspirantex 2020.
    Escort to the G-40 Bahia During Aspirantex 2020.
  • F-43 Liberal and F-45 União during Aspirantex 2020.
    F-43 Liberal and F-45 União during Aspirantex 2020.
  • F-43 Liberal and F-45 União during Aspirantex 2020.
    F-43 Liberal and F-45 União during Aspirantex 2020.
  • Liberal conducts drills with the Spanish Navy's Tornado in the Gulf of Guinea, 2023.
    Liberal conducts drills with the Spanish Navy's Tornado in the Gulf of Guinea, 2023.

See also

[edit]

References

[edit]

Citations

[edit]
  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. ^ "FOTOS: Mostra de Desarmamento da Fragata Niterói – F40". 28 June 2019.
  4. ^ a b c Saunders 2002, p. 70.

Sources

[edit]
  • 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.
[edit]
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