Active areas of research are all in the field of marine hydrodynamics, including resistance, seakeeping, maneuvering and offshore. In general, the research is a combination of analytical, numerical and experimental investigations. The most recent research has been in the development of techniques to solve fully nonlinear water wave problems. This work builds on the linear computations made using the Neumman-Kelvin approach for wave resistance and time-domain analysis for ship motions problems. The fully nonlinear calculations are done in the time domain starting from rest. An Euler-Lagrange time marching procedure is used in which the free surface boundary condition and body equation of motion are used to update the conditions on the free surface and body surface respectively. The entire technique has been designed for high-speed computations. Details of the method are described and an application to highly nonlinear shallow water waves is presented. eakeeping and wave resistance calculations for bodies of mathematical form are given. Improved numerical methods are discussed. Arbitrary geometry and transom stern considerations are presented in.