The other effect that is much more severe perhaps is due to a change in wave pattern. The wave pattern in deep water and the wave pattern in shallow water, are quite different. So, the wave that the ship generates would now change in its pattern, and the general relationship of speed to wave length we have seen as, (Refer Slide Time: 05:20) isn’t it what we had given last time? That speed of the wave is equal to this in deep water. This is what we had seen yesterday when we discussed over wave making