Occurence of encountered dangerous waves
Sofia Åberg, Igor Rychlik and Ross Leadbetter
Centre for Mathematical Sciences
Lund Institute of Technology,
Distributions of wave characteristics of ocean waves, such as slope, amplitude
or wavelength, are an important tool in the study of ship stability. In such
studies, spatial properties of the sea surface at fixed time points are often
considered, although it would be more interesting to study the properties
of those waves that a ship actually encounters when it sails on the ocean.
In this paper we derive distributions for several wave characteristics that
can be related to steepness of waves for two different cases, namely for
waves observed at a fixed time point and for waves encountering a ship. The
distributions obtained in these two ways will not be the same and it turns
out that the difference between them can be explained in terms of wave velocity.