Bathymetry is the technique used to measure and explore the depth of the water bodies covering the majority of the surface of the earth. This book offers several developments which occurred in bathymetry with the help of acoustics, electromagnetic and radar sensors. In addition, application of all these developments from gas seeps, coral colonies at the coastal bed to huge reservoirs and palynology is also discussed. This book compiles the works of many international scientists and researchers who have worked in varied conditions all around the world.