To counteract with the waves and the constant motion of the sea, breakwaters were built all around the island. They were 3 meters high and 160 kilometers in total length. Expanded over a length of about 11.5 kilometers, the base of these breakwaters and the island itself were constantly monitored during construction process with the help of deep sea divers. The divers checked the alignment and placement of the rocks beneath the surface to ensure its stability. Shape of the island was monitored using the global positioning system.