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  1. Analytical -  Wave penetration is computed on a grid within the harbour basin and is based on the Cornu spiral principle (solving the Sommerfeld equations incl. Fresnel integrals). Note that this does not take into account processes such as wave reflection and diffraction.
  2. Diffrac2DH - Wave penetration is computed using the numerical Diffrac2-DH schemisation (solving the Helmholtz equation). This method takes reflection and diffraction into account.