Offshore wind turbine systems and processes for installing same

A process for installing a floating wind turbine support structure, comprising:

• laying a plurality of mooring legs on a floor of a body of water;
• positioning an anchor structure that includes a buoyancy module on a surface of the body of water;
• connecting a first end of each mooring leg in the plurality of mooring legs to the anchor structure;
• connecting a second end of each mooring leg in the plurality of mooring legs to the floor of the body of water;
• lowering the anchor structure to a stable position below the surface of the body of water when the plurality of mooring legs is connected thereto;
• positioning the floating wind turbine support structure above the anchor structure;
• lifting the anchor structure and at least portion of the plurality of mooring legs such that the anchor structure is in a connectable position relative to a mooring structure of the floating wind turbine support structure;
• and
• connecting the anchor structure to the mooring structure of the floating wind turbine support structure.