HMS Westminster F 237, HMS Iron Duke F234등 Type 23급 프리깃입니다
Duke급이라고도 알려진 이 프르깃은 1989년 1번함이 취역한 이래 2002년 6월 마지막함정인 HMS St Albans까지 총 16척이 건조된 영국해군의 주력함정으로 현재 13척이 운용되고 있으며 HMS Norfolk F230 (2006년 11월 인도 Almirante Cochrane (FF-05), HMS Marlborough F233 (2008년 인도 예정 CS Almirante Condell (FF-06), HMS Grafton F80 (2007년 3월 인도 CS Almirante Lynch (FF-07)등 3척은 칠레해군에 매각되었습니다.

제원
무장시스템
2 x quadruple Harpoon missile launchers
32 x Vertical Launch Sea Wolf Surface-to-air missiles (VLS GWS 26 Mod 1 Block 2 system)
1 x 114 mm (4.5 in) Vickers Mark 8 gun (all ships being upgraded to Mod 1 standard)
2 x Oerlikon 30 mm L/75 KCB guns on single Laurence Scott DS-30B mounts. Being upgraded to remote control with electro-optic director
4 x Cray Marine 324 mm (2 twin) fixed torpedo tubes, Marconi Sting Ray
NATO Seagnat, Type 182 and DLF3 countermeasures launchers

운용헬기:
Westland Lynx HM.8 or AgustaWestland Merlin HM.1 helicopter

헬기용 무장:
Sea Skua missiles (Lynx onl　　y)
Sting Ray torpedoes
depth charges

Electronic Systems
Search: BAE Systems Radar Type 996 Mod 1, 3D surveillance
Navigation: Kelvin Hughes Radar Type 1007 and Racal Decca Type 1008
Fire control:
2 x GEC Marconi Type 911 Sea Wolf systems
Sperry Sea Archer 30 optronic surveillance / director
Bow sonar: Thales Underwater Systems Type 2050
Towed sonar: Ultra Electronics Type 2031Z, being replaced by Type 2087 in eight ships
Combat Management System: BAE Systems Command System DNA(1)