These unit.s are called 'Seabees' - what else would you call something that forms a honeycomb in the sea? Invented by me one Saturday afternoon in Sydney, August 1974. First used at Christian Brothers beach house at Wamberal Beach [ref Brother Cramm] in 1978. First major installation at Abbot Pont, Queensland, 1981. Cronulla Beach Seawall also incorportese a floating gabion to in the beach over the remnants of the 1939 wall which was damaged in 1939 & finally collapsed in the storms of 1974. Cramic Seabees can be found at Garden Island and Gosford, also at Green Island. Recent projects include Patagonia, Cocos (Keeling) Islands, Beacon Point [Melbourne], Blackpool & Al Khiran in Kuwait.