The second event is shown in Fig. 3 and the estimated parameters in Table 2. In this event there is a strong turning wind from 190◦ to 360◦. At the beginning there is a strong wind generated wave at 180◦. The frequency of this wave starts to decrease which means that this wave becomes a traveling one, while a second wave is generated between 300◦ and 360◦. Finally, the wave at 360◦ dominates the spectrum. The contribution of the traveling wave in this event can be more than 40% of the total wave, which can lead to serious underestimation of the wave height.