Abstract
In the previous report, the authors discussed that the tension of mooring ropes was different before and behind a fair leader, and that the strength of mooring ropes decreased near a fair leader under a constant load. In this paper, the strength of mooring ropes is examined under the repeated load in order to estimate the fair leader effect. The obtained results are summarized as follows : (1) Breakage of fiber ropes occurs surely near a fair leader under the repeated load, even if a fair leader works smoothly. (2) The breakage occurs at the load less than the strength of the ropes under the repeated load. The load is 50% of the strength in this experiment. (3) The smaller the angle of mooring rope at a fair leader is, the fewer the repetition till the breakage becomes.
