The concept of one operator controlling multiple unmanned ground vehicle (UGV) robots is examined in a simulation of a multiple UGV search task. Semi-autonomous robotic UGVs were simulated searching for radioactive targets while operators performed various sub-tasks including monitoring status, responding to prompted target decision events, and detecting contextual errors. Participants executed a series of scenarios using 1, 2, or 4 UGVs simultaneously. The detection of contextual errors is particularly difficult when multiple vehicles are being supported. Specific interface features designed to assist with multiple vehicle operations are discussed including a quick video playback (QVP) function.
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