Analysis of sea states in deep water. - Discussed will be the difficulties of an analytical solution for the wave period and the wave height probability - The closed solution for the wave height probability in the limit of the band-width approaching zero - The closed solution for the wave height probability in the limit H/sqrt(m0)->inf. - The wave groups: 1. A recent theory 2. How a high wave forms in an open sea 3. How a high wave forms at a wall 4. How a high wave forms off a wall 5. How a high wave forms in the shadow cone behind a wallICCE 199