The beach nourishment is an already employed option on the littoral area of Romania, Black Sea. Quite large quantities of marine sand are necessary for implementing the program of artificial placement of sand on the eroded shore areas and for the maintenance of these works. In order to minimize the financial effort to find accumulations of marine sand on the Romanian continental shelf, in the 20-50m water depth domain, the seismoacoustic methods (multibeam echosounding, sub-bottom profiling and side scan sonar) can be successfully employed. The concurrent use of these methods can allow the mapping the most favorable areas for sand accumulations areas.