This study was based on the analysis of seismic patterns in shallow seismic sections, and percussive boreholes that were performed for the subsurface geotechnical investigation in the main channel of the Port of Recife. Intended for students, professors and professionals in the field of geology and geophysics, it uses geophysics applications in the shallow marine environment in a practical way. Reflection seismic and single-beam bathymetry - the geophysical methods covered in this book, which will provide the reader with the application of geophysical techniques during data acquisition, processing and interpretation.