Niterói-class frigate

	Independência
Class overview
Name	Niterói class, Mk10
Builders	Vosper Thornycroft; Arsenal de Marinha do Rio de Janeiro;
Operators	Brazilian Navy
Succeeded by	Tamandaré class
Built	1972–1986
In commission	1976–present
Completed	7
Active	6
Retired	1
General characteristics
Type	Frigate
Displacement	3.355 t (3.302 long tons)
Length	129.2 m (423 ft 11 in)
Beam	13.5 m (44 ft 3 in)
Draught	5.5 m (18 ft 1 in)
Propulsion	CODOG, two shafts; 2 × Rolls-Royce Olympus TM-3B gas turbines 42,000 kW (56,000 hp) combined; 4 × MTU 16V 956 TB91 diesel engines 13,000 kW (17,000 hp) combined;
Speed	30 knots (56 km/h; 35 mph) (maximum); 22 knots (41 km/h; 25 mph) (diesels only);
Range	5,300 nmi (9,800 km; 6,100 mi)
Endurance	45 days
Complement	217
Sensors and ; processing systems	Modernized; Alenia RAN-20S air search radar; Terma Scanter surface search radar; Orion RTN-30X fire control radar; Saab EOS-400 optronic director; Krupp Atlas EDO-610E hull mounted sonar; SICONTA Mk 2 C3I system;
Electronic warfare ; & decoys	Modernized; Cutlass B1W ESM; ET/SQL-1 ECM; 12 × 102 mm decoy launchers;
Armament	Modernized; 1 × Albatros launcher for 8 Aspide surface-to-air missiles; 1 × 114 mm Mark 8 gun; 2 × Bofors 40 mm guns; 2 × twin launchers for Exocet anti-ship missiles; 2 × triple torpedo tubes for Mark 46 torpedoes; 1 × double-barrel Bofors Boroc anti-submarine rockets;
Aircraft carried	Westland Super Lynx Mk.21B helicopter
Aviation facilities	Helipad and hangar

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

Gallery

Niterói
Defensora
Constituição
Independência
Liberal and União
Aspide fired by Defensora

References

^ "Akaer revitalizará consoles do sistema SICONTA MkII Mod. 1 de três fragatas classe Niterói". Poder Naval (in Portuguese). 31 May 2019.
^ ^a ^b ^c ^d Saunders 2002, p. 61.
^ ^a ^b ^c ^d Saunders 2002, p. 70.
^ "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.

[1] "Akaer revitalizará consoles do sistema SICONTA MkII Mod. 1 de três fragatas classe Niterói". Poder Naval (in Portuguese). 31 May 2019.

[jfs2002_p61-2] Saunders 2002, p. 61.

[jfs2002_p70-3] Saunders 2002, p. 70.

[4] "FOTOS: Mostra de Desarmamento da Fragata Niterói – F40". 28 June 2019.

[1]

[2]

[3]

[4]

Niterói-class frigates
Niterói Defensora Constituição Liberal Independência União Brasil
Followed by: Tamandaré class
List of ships of the Brazilian Navy

Ship classes of the Brazilian Navy
submarines	Tupi class Riachuelo class
helicopter carrier	Atlântico^S
frigates	Broadsword class Niterói class Tamandaré class
corvettes	Inhaúma class
landing platform docks	Foudre class Round Table class
patrol boats	Amazonas class Macaé class Bracuí class Grajaú class NPa-500MB
minesweepers	Aratu class
replenishment tanker	Almirante Gastão Motta^S
submarine rescue ship	Guillobel^S
Icebreakers	Almirante Maximiano^S Ary Rongel^S Almirante Saldanha^S
research ships	Vital de Oliveira^S Cruzeiro do Sul^S Antares^S Sirius^S
training ships	Brasil^S Cisne Branco^S Aspirante Nascimento class
tugboats	Almirante Guilhem class Mearim class Triunfo class Aspirante Moura^S Aspirante Hess^S
S: single ship

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