The results of an airborne EM survey obtained with an INPUT system flown in the vertical-axis-receiver configuration have been assessed by the Geological Survey of Canada as favorable in terms of their potential contribution to the geological mapping carried out in the Project Pioneer study. Manitoba, Canada. Time-domain scale model profiles over the various conductor arrangements presented here have proven indispensable in the interpretation process. An outstanding example of this is the striking modification to an overburden anomaly made possible by the fortuitous location and dip of a conducting dike model below the overburden. The investigation indicates that during the course of an exploration survey, IN PUT data may be used directly to aid in the mapping of structural features or, indirectly in areas of conductive overburden, if the overburden is structurally controlled.