|Designers & naval architects have long recognized the need to
reduce the hydrodynamic drag on ships hulls, while not inducing the drag
of full flight. Using cushions and/or wings in ground effect, a craft is
able to stay aloft for a longer period of time with less power
requirements and hence fuel economies..
Over the centuries, developments have continued to be made in all
manner of high speed marine craft including hydrodynamic monohulls,
fast catamarans, hydrofoils, hovercraft, surface effect ships [SES] and
wings in ground effect [WIG].