WAVES AT OCEAN WEATHER SHIP STATION INDIA

Abstract

Two thousand four hundred wave records taken by Ocean Weather Ships in the North Atlantic have been analysed. Although taken over about thirteen years, the measurements should be representative of an average year. The results are presented in ways which, it is hoped, are of use to Naval Architects and Engineers. Wave height information is given in the form of percentage exceedance; this makes it possible to determine the percentage of time in which, for example, the significant wave height exceeded any specific height. Four such graphs are given one for each season of the year. Wave period is given, for each season, as percentage occurrence of zero-crossing period. The percentage occurrence is given of the spectral-width parameter, for the whole year. Significant wave height is related to zero-crossing period in a scatter diagram, which illustrates the relative occurrence of the various conditions, and of the steepness of the waves. One such diagram is given, covering the whole year. (Author)