The quasideterminism (QD) theory introduces a deterministic wave function (of both space and time) that shows what, most probably, will happen if an exceptionally large wave will occur at some point in a sea storm. This deterministic wave function holds for every configuration of the solid boundary, provided that the wave motion may be regarded as irrotational. This is the main feature of some conceptual novelties of the QD theory. The following invited lecture given at the 2006 OMAE Congress in Hamburg aims to emphasize these conceptual novelties through a fresh overall picture of the theory.

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