Describes methods to investigate response characteristics of a large harbor under construction. In the investigation a three-dimensional finite difference model is applied in conjunction with physical models and field observations to determine criteria for design and operation. In the modeling investigation, dynamic response of the harbor system induced by tide, incoming short/long waves, wind stress and bottom dissipation are considered simultaneously. Particular emphasis is on the wave- and strong-monsoon-induced oscillations that match the range of the resonant period of ships and mooring systems in the harbor. The resolution required to handle short period oscillation and wind stress precludes the possibility of using methods involving the inversion of extremely large matrices. Results of the numerical simulation at important localities within the harbor are later analyzed by spectral and cross-spectral methods. The same methods can then be used to study ships' responses at these localities with predicted water level and three-dimensional current components.