Support structure: winged foundation to support offshore energy structures

This application describes a caisson for insertion into a seabed along an insertion axis, comprising: a body comprising a first end for insertion into the seabed, and an opposing second end, the first end and second end having a wall extending therebetween, wherein the wall is aligned with and defines an insertion axis; a cavity enclosed by the wall, the cavity configured to receive the seabed during insertion; at least one primary blade extending outwardly from an external surface of the wall; and, at least one secondary blade extending laterally from the at least one primary blade, each of the at least one primary blade and at least one secondary blade comprising an insertion edge configured to be inserted into the seabed.