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Bittern Class, British Sloops


Photograph of HMS Black Swan

Imperial War Museum. Via Wikipedia Commons


Specifications:


Tonnage 1190 tons standard displacement
Dimensions 299'6" by 37'6" by 8'5"
91.29m by 11.43m by 2.57m
Maximum speed       19 knots
Complement
125
Armament 3x2 4"/45 DP guns (250 rounds per gun)
4x1 2pdr guns
4x1 0.30 Lewis machine guns
2 depth charge throwers
2 depth charge rack (40 depth charges)
Machinery
2-shaft Parsons geared turbine (4300 shp)
2 Admiralty 3-drum boilers
Bunkerage
364 tons
Range
6200 nautical miles (13,900 km) at 15 knots
Sensors
Type 127 sonar
Type 285 radar?
Modifications
Light antiaircraft generally upgraded to 6x2 20mm Oerlikon AA guns by the end of the war.


The Bitterns were completed in 1941-1943. Designed at a time of growing urgency to rearm before war broke out, they were to be inexpensive ships with enough speed to allow them to leave a convoy to hunt a submarine and be able to quickly catch up afterwards. Their main armament reflected a growing concern with adequate antiaircraft capability.

All those serving in the war against Japan were Royal Indian Navy units.

Units in the Pacific:


Sutlej     
Arrived 1941-12-11 

Narbada     
Arrived 1943-8-21

Jumna
Arrived 1943-9-12

Godavari
Arrived 1944-4


References

Friedman (2006)



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