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This paper describes an evaluation of the impacts of introducing change into the established complex system of UAS operations. Two technologies not currently used in UAS operations, a backup communications system and a traffic display, were operated by Guardian UAS pilots as they shadowed live UAS flights in a back-up control station. The flights were demonstration rather than research flights; we nonetheless were able to make the most of the opportunity and collect observation, survey, and interview data to gain insight into effects of the technology insertions. Technology-insertion impacts and recommended technology adaptations were categorized into emergent themes. The identified themes were found to align with three of the five basic generic support requirements for cognitive work proposed by Woods (2005, Generic support requirements for cognitive work: Laws that govern cognitive work in action. Proceedings of the HFES 49th Annual Meeting. Santa Monica, CA: HFES).