In the exclusive economic zone, the coastal State shall have the exclusive right to construct and to authorize and regulate the construction, operation and use of: (a) artificial islands; (b) installations and structures for the purposes provided for in article 56 and other economic purposes;
Infrasound may also be used for long-distance communication in African elephants. These calls range from 15â35 Hz and can be as loud as 117 dB, allowing communication for many kilometres, with a possible maximum range of around 10 km (6 mi).
Cavorite is from H.G. Wells' The First Men in the Moon, while Inertron is from the Buck Rogers comic strip, and are impervious to gravity and can shield other materials from its effects. When used on airships and spaceships, they can counter gravity like a ballast in water, or a balloon in the air.