Experimental Study on the Effect of Mooring Angle on Mooring Tension of Porous Saw Type Floating Breakwater

: The floating breakwater is commonly used as an alternative solution to conventional fixed breakwaters and can be used effectively in coastal areas in environments with relatively small waves, poor soil conditions, deep-sea depth, and shore with intense erosion rate. Since it is a floating structure, a mooring system is used to maintain its position. This study aims to determine the mooring tension that occurs on each mooring rope with a physical model test. This research was conducted on the type of pontoon and porous saw. In this study, it was found that on a porous saw type, the greatest maximum tension occurred at the mooring angle 30⁰ (3.98 N) while the smallest maximum tension occurred at the mooring angle 60⁰ (0.73 N). The pontoon type also gives the same result where the 30⁰ mooring angle gives the highest maximum tension (4.91 N) while the 60⁰ mooring gives the smallest maximum tension (1.27 N). Besides, the porous saw type of floating breakwaters can provide smaller mooring tension than the pontoon type. The porous saw type can reduce mooring tension by 10% up to 15% at an angle of 30⁰ - 60⁰.