Motion of a Submarine in a Realistic Sea

The problem of the theoretical motion of a submarine beneath a realistic sea is treated. The various forces on an ellipsoidal hull due to a multidirectional sea are derived including diffraction effects. The modification of these forces due to a thin sail is established. Numerical techniques are introduced that make the computation of the total sea force more efficient. The resultant description of ship motion is being used by Vitro Laboratories in the simulation of the POLARIS Weapon System.