Ground-effect machines.

2000 HSC Code: international code of safety for high-speed craft, 2000 International Maritime Organization 2001 Air-cushion vehicles for use in developing countries United Nations. Dept. of Economic and Social Affairs 1974 Code of safety for dynamically supported craft Inter-Governmental Maritime Consultative Organization 1978 Hovercraft technology, economics, and applications Amyot, Joseph R 1989 The economics of invention and innovation Johnson, P. S. 1975 Theory and design of air cushion craft Yun, Liang 2000