"George Philip " underwent an overhaul at Southwest Marine in San Diego, California from December 1987 to June 1989 . While in overhaul the ship received major upgrades in anti-submarine warfare ( ASW ) capabilities among which, the ship was fitted with a Tactical Towed Array Sonar ( TACTASS ).
42.
Although both variable-depth sonar such as ESS-1 medium-frequency VDS ( the Chinese development of French DUBV-43 VDS ) and H / SJG-206 linear towed-array sonar were successfully tested on board, these were abandoned because incorporating these extra sonars would lead to significant redesign of the hull and increased cost.
