Type 21 Frigate - Amazon class
Eight built - HMS Amazon, Antelope, Ardent, Active, Ambuscade, Arrow, Alacrity, and Avenger. Designed to replace the Leopard and Salisbury Class Frigates. Initial cost were to be £3.5 million but HMS Amazon actually cost £14.4 million. Built by private Ship builders. Vosper Thornycroft, (HMS Amazon, Antelope and Active) with the other five by Yarrow's. Two of the class were lost during the Falklands War - HMS Antelope Sunk 24th May 1982 and HMS Ardent 22nd May 1982, The rest of the class were later sold to Pakistan.

Complement
10 Officers and 170 Ratings
a saving of almost a third of
equivalent vessels.As a result
improved living standards
.
Dimensions
Displacement 2750 tons std
3250 tons max
Dimensions 384' x 41' 9"
Draught 19' 6"

Armament
Main guns 1 x Mk8 4.5"
Secondary guns 2 x 20mm Oerlikon (2 x 1)
Torpedo tubes STWS1
SAM:4 x SeaCat (1 x 4)
Countermeasures 2 x Corvus chaff launchers
1 x Type 182 towed decoy

Refitted
SSM:
4 x MM38 Exocet (4 x 1) between 1984 - 1985.

Helecopter
1 x Westland Wasp
later replaced 1 x Westland Lynx

Radar
Type 992Q surveillance
Type 978 navigation
2 x Type 912 fire control

Sonar
Type 184M
Type 162M
Other

2 x GWS24 SeaCat fire control
1 x Cossor Type 191 IFF

Machinery
Engines COGOG
(Combined Gas or Gas)

2 x Rolls Royce Olympus gas turbines Power output 50000 shp
speed 30+ knots
range 1200 nautical miles @ 30 knots

2 x Rolls Royce RM1A Tyne gas turbines for extended cruising
Power output 8500 shp
Speed 18 knots
range 4000 nautical miles @ 17 knots

Shafts 2