This is a floating wind energy platform being tested in the Lir National Ocean Test Facility, MaREI, UCC, Cork, Ireland. The wave conditions shown are some of the worst that can be expected off of the west coast of Ireland.
The little man on the front leg would be 6 feet or 182 cm tall at full scale.
This work funded by LEANWIND. An EU FP7 project coordinated by UCC.