The popular form outlines the basics of the theory of air cushion formation and the mechanics of movement (flight) of hovercraft. Design ratios are given, knowledge of which is necessary when designing small amateur vessels. Examples of the most common design solutions are given. Trends and development prospects of this type of vessels are considered. The text is supplemented with a large number of illustrations. For people interested in the construction of amateur ships, ship modellers and water sports enthusiasts.