Abstract
A long flexible floating board made of the complex of needle-trees has been developed to moor small vessels like pleasure boats. The present paper investigates experimentally the wave transmission and left-lettlection of the board. The transmission coefficient KT and left-lettlection coefficient KR do not depend on the relative width of the board (width/wave length) but on the incident wave steepness. The value of KT decreases and KR increases as the wave steepness becomes large. The wave transmission coefficient becomes much smaller as the draught of the front float is deepened.
