Builders:
C : Cammell Laird, Birkenhead, United Kingdom
V : Vickers, Barrow, United Kingdom
Dimensions:
425' x 33' x 30' / 129.50m x 10.10m x 9.10m
Displacement:
7500 tons surfaced / 8400 tons dived
Complement:
143
Armament:
All boats:-
6 x 21" bow torpedo tubes
Mk20 and Mk23 antisubmarine torpedoes are carried along with Mk8 antiship. In addition, 16 Polaris A3
SLBM are carried in seperate launch tubes.
Powerplant:
One Rolls Royce PWR1 nuclear reactor is fitted, driving two English Electric steam turbines producing
a total of 15000shp. A single Paxman backup diesel of 4000bhp is also fitted, along with two WH Allen
turbo generators of 3400kW total output. One shaft is fitted.
Maximum speed is 20kts surfaced and 24kts submerged.
Electronics Fit:
Radar:
Type 1006 navigation
Sonar:
Type 2001 active/passive
Type 2007 passive
Type 197 intercept
Other:
Dowty SAFS 3 FCS fire control
Miscellaneous:
Two SSDE decoy launchers are fitted.