In this paper, we present a new Electromagnetic Compatibility (EMC) measurement and verification system for ships, based on real time digital signal processing techniques, in combination with a VLF-UHF receiver. We programmed all the algorithms for the systems, in order to have reliable software, known, expandable and intuitive. The basis of our strategy is first described, then, our implemented computing algorithms are explained. Recommendations and examples about the significant parameters for dealing with the measurement process are given, and finally several measurements are performed to validate the proposed method.