Representation of a seastate. Principles of surface wave interaction with ships and marine structures. Hydrostatic restoring, Froure-Krylov, diffraction and radiation forces. Equations of motion in the frequency and time domain. Resonant modes of motion. Response transfer functions. Encounter frequency and forward speed effects. Seakeeping of ships. Strip theory. Slender body theories. Derivative seakeeping responses. Added resistance. Large amplitude motions and dynamic stability. Slamming and deck wetness. Wave loads and seakeeping of marine structures. Second-order effects. Morison’s equation. Computational methods.