Author(s)

A. Souto & J.A. Ortiz

Abstract

Fast ferry market is currently one of the fastest growing sectors of the marine industry. Usually high speed vessels' (HSV) routes are in shallow waters, where long period waves become large amplitude waves inducing damages in moored vessels, sea shores, docks, etc. We begin by explaining the ship wave pattern, then we explain a method of analyzing this wave pattern in terms of a spectrum, and we use Ursell's ray theory to propagate such pattern in finite depth water. Finally, we talk about some recent issues of wake wash: criteria, effects, regulations, etc. 1 Three-dimensional ship waves From fig. 1, a plane wave can be expressed as: C(x, 2/, t) = A cos(kx cos 0 + ky sin 0 - wt) — A cos(kx' — wt) (1) More general wave motions, no longer monochromatic, can be obtained by superposing plane waves of different wavenum

Keywords