Sea State Calculation of the Strait of Tsugaru

Abstract

Many ships encounter heavy severe sea states in the northern Japan, especially near Hokkaido. When the sea state can be predicted, ship operation and maneuvering become safer and sea casualties will be decreased. For this purpose, this paper presents the numerical sea state calculation method on the Strait of Tsugaru, between Honshu and Hokkaido, and discuss the difference between the observed wave heights obtained by the suspended type wavemeter and the calculated values previously obtained. Moreover, the methods to obtain the wind direction and force in the strait are shown by using the track and the pressure of the center of a cyclone.