Abstract: The article presents the results of approximation calculations of the vacuum field hydrodynamic around the ship, calculated by finite element method. The control points in the middle panels distributed on the hull of the ship, on the surface of the seabed and the free surface singularities are placed in the form of spatial resources and discounts, or dipoles. Presented results of the calculations have been obtained using this first singularity. Then, using the observed field properties proposed approximation of hydrodynamic pressure distribution functions: polynomial of the ninth grade after the ship's length and the width of the exponential function, which can significantly reduce the amount of numbers needed to describe the field. For a given depth to about 20, and the entire field space can be described in a matrix of approximately 200 numbers.