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Teleoperation of mobile equipment is attracting growing interest as a safe and viable technological means of allowing humans to perform work in hazardous environments without compromising safety and health. Relative to telemanipulation, which has been more intensively studied, mobile equipment teleoperation poses distinct operational challenges, because the mobile device must be navigated and controlled by the remote operator during dynamic interaction with often unpredictable terrain and sensory environments. This report evaluates this issue from the perspective of behavioral cybernetics, with a focus on the closed-loop control properties of behavioral performance and how and why such control may be compromised during teleoperation of mobile equipment. The conceptual paradigm adopted in the paper is to treat a mobile device during onboard operation as an exoskeleton, a structural and functional extension of the operator's own body.