Transfer of training from the C-130 WST to the aircraft was assessed in a Follow-on Operational Test and Evaluation (FOT&E). The study was accomplished in three phases corresponding to initial qualification (Phase I), mission qualification (Phase II) and continuation (Phase III) training. In the first phase the nature of skill acquisition and the impact of WST training were addressed using student copilots who were learning approaches, landings, and engine-out go-arounds. In the second phase, WST training effectiveness was assessed for lead and formation flight, maximum effort landings, and recoveries using mission qualification pilots. In the third phase, effectiveness for engine-out take-offs and windmill taxi starts was assessed using mission ready pilots. Training in the WST generally transferred positively to the aircraft as measured by proficiency ratings and by sorties to criterion. Recommendations for modifying the WST curriculum were made based on these results as well as other observations made during the FOT&E.