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YARRA frigates (1961)


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Yarra 1980

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Yarra F07, 1969- 45   Williamstown DYd 9.4.1957 30.9.1958 27.7.1961 decommissioned 11.1985, BU 1985
Parramatta F05, 1969- 46   Cockatoo I DYd 3.1.1957 31.1.1959 4.7.1961 decommissioned 11.1991, BU 1991


Technical data


Displacement standard, t

2150

Displacement full, t

2560

Length, m

109.7 pp 112.7 oa

Breadth, m

12.5

Draught, m

3.90 max

No of shafts

2

Machinery

2 sets Yarrow geared steam turbines, 2 Babcock & Wilcox boilers

Power, h. p.

30000

Max speed, kts

29

Fuel, t

oil 370

Endurance, nm(kts)

4500(12)

Armament

1 x 2 - 120/45 Mk 6, 1 x 2 - 40/60 STAAG Mk 2, 2 x 3 - 305 Limbo Mk 10 ASWRL

Electronic equipmenttype 275, type 262, type 293, type 277, type 978, LW-02 radars, type 162, type 170, type 177M, type 185 sonars
Complement

152 - 231



Graphics


<i>Yarra</i> 1980
Yarra 1980


Project history

In August 1950 plans for six Type 12 frigates were announced, but subsequently the number was cut to four; No 5 and No 6 were later reordered to a modified design. They incorporated all the improvements of the RN Rothesay class, and in addition had MRS 3 fire control and Dutch Signaal LW-02 air warning radar. The second pair had the forecastle deck extended aft to the stern, providing additional accommodation. Stuart was the first to be fitted with the Ikara ASW system, which replaced one of the Limbo Mk 10 mortars aft, and Derwent was the first RAN ship to receive the Seacat GWS22 missile system in lieu of the twin 40mm Bofors.

Modernizations

1964?, Parramatta; 1967, Yarra: - 1 x 2 - 40/60, 1 x 3 - 305 Limbo ASWRL, type 262 radar; + 1 x 4 Seacat GWS22 SAM (24 Seacat), 1 x 1 Ikara ASuM (30 Ikara), type 904 radar

1975, Yarra: - type 170, type 177M sonars; + Mulloka sonar

1977, Yarra: - 1 x 3 - 305 Limbo ASWRL, type 293, type 904 radars; + helicopter deck, SPS-55, WM-22 radars

1981, Parramatta: - 1 x 3 - 305 Limbo ASWRL, type 293, type 904 radars, type 170, type 177M sonars; + 2 x 3 - 324 TT, SPS-55, WM-22 radars, Mulloka sonar

Naval service

No significant events.