The Pearl Harbor-based guided missile cruiser USS Chosin (CG 65) returned to sea for sea trials June 26 to test and validate modifications and newly installed equipment. Her recently completed extended drydocking ship's restricted availability (EDSRA), valued at more than $25 million, was a 232-calendar day overhaul that included modifications to equipment involving every department aboard the ship. Battlegroup. subcontractors. weapons control system (ATWCS) upgrade and an electric galley modification. The hull girder modification, which enhances the ship's survivability during prolonged navigation under extreme weather and sea conditions, was the most extensive undertaking. the vicinity of the forward superstructure. elements while the contractor performed the modifications.