What is a rubble mound breakwater?
A breakwater is a structure made of natural stone or concrete elements which gives shelter to a shoreline, harbour, anchorage, or basin from the direct impact of incoming waves. A rubble mound breakwater normally consists of a core of small size rock covered with large [heavy] rocks or concrete elements. This outer layer is called the armour layer. An under-layer of rock is provided between the core and the armour layer.
