 Hulled designs are often powered by pump-jets coupled to medium-speed diesel engines.Hovercraft are usually powered by gas turbines or diesel engines driving propellers and impellers.The design and safety of high-speed craft is regulated by the International Convention for the Safety of Life at Sea (SOLAS) Convention, Chapter 10, High-Speed Craft (HSC) Codes of 1994 and 2000, adopted by the Maritime Safety Committee of the International Maritime Organization (IMO).