Reflection and the transmission of solitary waves on a two layer fluid over a small step; some recent advances on wave effects on large offshore structures; nonlinear mechanics of gravity waves on deep water - on the Nonlinear Schrodinger Equation; prediction of wave breaking processes at the coastline; wave breaking simulation; second order wave leads in 3D bodies in regular waves; recent mathematical developments of potential theory applied to diffraction of water waves. (Part contents).