This report describes the skills required in the operation of an amphibious air cushion vehicle (ACV) in Army tactical and logistic missions. The research involved analyzing ACV characteristics, operating requirements, environmental effects, and results of a simulation experiment. The analysis indicates that ACV operation is complicated by an inherently slow vehicle response in certain control dimensions, a need for complex control coordinations in performing certain necessary maneuvers, and the ACV's sensitivity to various aspects of the natural and man-made environment. The ACV also poses unique requirements for navigation, maintenance, and collision avoidance. The simulator study showed that ACVs vary considerably in operability because of their control configuration. A need is seen for further attention to the control problem in developing ACV use on land. A training program lasting one to three months appears necessary to qualify an operator fully. (Authors/LY)