One Kelvin Type 1008 surface-search radar was fitted.
The weapons computers were DCB and a nav fit of SINS 1, replaced by SINS2 on its second refit.
The main sonar array was Type 2001 , this was supplemented by a 2007 flank array and a non retractable towed array.
Two periscopes were fitted, a binocular search periscope and a monocular attack periscope with built in sextant.
Weapons included Mark 8 torpedoes, Mark 24 Tigerfish torpedoes, and Sub Harpoon anti ship missiles
Six 21-inch (533 mm) torpedo tubes fired from the bow.