A monopile (single column), six meters in diameter, is used in waters up to 30m deep.
Gravity base Structures, for use at exposed sites in water 20- 80m deep.
Tripod piled structures, in water 20-80m deep.
Tripod suction caisson structures, in water 20-80m deep.
Conventional steel jacket structures, as used in the Oil & Gas industry, in water 20-80m deep.
Floating wind turbines are being developed for deeper water.