Significant wave height significant wave height significant wave height significant wave height English significant wave height significant wave height significant wave height English significant wave height significant wave height English significant wave height significant wave height Significant Wave Height significant wave height significant wave height significant wave height significant wave height significant wave height significant wave height significant wave height significant wave height significant wave height significant wave height 有義波高 Significant wave height significant wave height significant wave height significant wave height significant wave height English English English significant wave height significant wave height significant wave height significant wave height Rayleigh distribution significant wave height Significant wave height English view article Significant wave height significant wave height English significant wave height significant wave height English http://en.wikipedia.org/wiki/Significant_wave_height