ABSTRACT
If the water around a ship is considered as inviscid incompressible fluid the important hydrodynamic information is derived from the solutions of boundary value problems for the velocity potential. Founded on basic physical principles the nonlinear problems with apriori unknown boundaries are simplified by linearization and the solutions of corresponding linear problems are practically used. Consider a vessel floating with a zero forward speed in shallow water with the depth H under the action of regular waves ζv = rveiσt , rv and σ being wave amplitude and circular frequency accordingly.
