In this paper the results of physical modeling investigations of IRAN-LNG main breakwatersections are presented. In this study two important points of: Hydraulic stability and Hydraulic responsesof 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 breakwatersections with only difference in Toe Berm parts were tested in order to finding out and choosing morestable Toe Berm. The geometrical scale factor of 1:35 was selected. Three wave conditions as yearly, 50years and 100 years return periods with three water levels have been considered. Totally 34 tests wereperformed in order to carry out the stability of Armour layer Xbloc? units and Toe Berm stability and alsowave run-up heights and Overtopping rates. Results have been presented by profiles, photographs andrelated values.
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