In this paper the results of physical modeling investigations of IRAN-LNG main breakwater sections are presented. In this study two important points of: Hydraulic stability and Hydraulic responses of breakwater section were investigated. The breakwater section is composed of two types of materials, Xbloc?s at the Armour layer and the Armour stones in other parts of structure. Two types of breakwater sections with only difference in Toe Berm parts were tested in order to finding out and choosing more stable Toe Berm. The geometrical scale factor of 1:35 was selected. Three wave conditions as yearly, 50 years and 100 years return periods with three water levels have been considered. Totally 34 tests were performed in order to carry out the stability of Armour layer Xbloc? units and Toe Berm stability and also wave run-up heights and Overtopping rates. Results have been presented by profiles, photographs and related values.
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