Vahid Chegini - Ph.D.in Coastal Engineering Iranian National Center for Oceanography (INCO) The Ministry of Science, Research & Technology, Tehran
Peyman Aghtouman - Soil Conservation & Watershed Management Researsh Center (SCWMRC), The Ministry of Agriculture, Tehran

This paper presents the results of hydraulic model test on the stability of rubble mound breakwaters with armour layers of antifer blocks. The test were performed using irregular waves. The effect of wave parameters and the structure slope on the stability of these artifial armour units has been investigated and the stability formulas has been derived. Finally a comparison between these formulas and the stability relationships derived by van der Meer (1988) for cubes has been made.