“…These methods will make it possible to evaluate qualitatively not only wind waves, tidal oscillations, and extreme waves but also the subtle nonlinear effects of their behavior. First of all, they include rogue waves, the amplitudes of which are more than 2.8 times higher than the amplitudes of regular sea waves [ 17 , 18 ], meteorological tsunamis [ 19 , 20 ], storm surges [ 21 , 22 ], and other catastrophic phenomena. In our work, to quantify the amplitudes of sea waves, we used verification of the data from the supersensitive detector of hydrosphere pressure variations through comparison with the data from the pressure sensor of the Mini SVP sound velocity profiler from Valeport [ 23 ].…”