Naval Historical Collectors Research Association

This class were the first in a long line of RN post-war frigates (apart from the destroyer conversions - Type 15 and 16) and can be considered as the best ASW escorts of their era. The 6 Whitby's were in effect the prototypes of every Royal Navy ASW Frigate up until the Type 21 and Type 22 in the late 70's. The Rothsay's originally differed only in internal layout but were later refitted to virtual Leander standard.

Description Type 12 Anti-Submarine Warfare Frigate

Propulsion

Steam Turbine 3000shp, 2 Shafts, Speed 29knots (max)

Displacement

2150 tons Standard, 2560 tons Deep

Dimensions

112.7m x 12.5m x 3.9m

Sensors

Type 275 Mk6M GFCS Tracker (type 903 MRS3 GFCS in modernized Rothsay's)
Type 262 MRS1 GFCS Tracker (STAAG FC)
Type 974/978 Navigation Radar (Type 978 navigation radar in modernized Rothsay's)
Type 293 Low Angle Air/Sea Search (Type 994 surface/air search set in mod Rothsay's)
Type 277 Height Finding Radar (deleted in mod Rothsay's)
Type 174/177 Search Sonar
Type 170 Attack Sonar
Type 162 Bottom Profiling Sonar

Armament
(as completed)

1 Mk6 Twin 4.5"/45 DP Gun
1 Mk2 STAAG Twin 40/60mm AA (later replaced by 1 Mk9 40/60mm AA)
2 x Mk10 Limbo ASW Mortars
14 x 21" ASW TT

Rothsay Class
After Modernisation

1 Mk6 Twin 4.5"/45 DP Gun
1 Mk10 Limbo ASW Mortar
2 x 20mm AA
1 GWS 22 Quad Seacat System
1 Wasp Helicopter

Pnt	Whitby Class	Commissioned	Pnt	Rothsay Class	Commissioned
F36	Whitby	1958	F107	Rothsay	1960
F43	Torquay	1956	F108	Londonderry	1961
F63	Scarborough	1957	F106	Brighton	1961
F65	Tenby	1957	F113	Falmouth	1961
F73	Eastbourne	1958	F101	Yarmouth	1960
F77	Blackpool	1958	F129	Rhyl	1960
			F103	Lowestoft	1961
			F115	Berwick	1961
			F126	Plymouth	1961

A brief outline of this class