1. A computer-implemented method of predicting field noise due to ocean flow comprising the steps of: receiving a first observation point and surrounding magnetic field vectors; receiving ocean model data including ocean volume, ocean flow in the ocean volume, and ocean electrical properties in the ocean volume; generating a plurality of ocean cells within the ocean volume around the first observation point based on the ocean model data, the ocean cells having the ocean flow and the ocean electrical properties; generating a plurality of tri-axial equivalent electrical currents corresponding to the plurality of ocean cells; generating a plurality of unit tri-axial electric bipole transmitter sources corresponding to the plurality of ocean cells; determining one of a plurality of magnetic field vectors and one of a plurality of electric field vectors based on the unit tri-axial electric bipole transmitter sources; scaling one of the plurality of magnetic field vectors and one of the plurality of electric field vectors based on the plurality of corresponding tri-axial equivalent electric currents; and generating a first magnetic field noise forecast and a first electric field noise forecast between the first observation point and the plurality of ocean cells based on a vector sum of magnetic field contributions from the plurality of magnetic field vectors and a vector sum of electric field contributions from the plurality of electric field vectors.