1. INTRODUCTION: PERSIAN GULF IS A LARGE SEMI-ENCLOSED BAY LOCATED IN THE MIDDLE EAST AND SURROUNDED BY IRAN, IRAQ, KUWAIT, SAUDI ARABIA, QATAR, BAHRAIN, UNITED ARAB EMIRATES AND OMAN. THE SPECTRUM OF WIND-WAVES WHICH ARE VERY IMPORTANT FOR THE DESIGN OF MARINE STRUCTURES IS AFFECTED BY THE RELATIVELY SHALLOW WATER BASIN AND ALSO BY THE SURROUNDING TOPOGRAPHIES.