Oceanography deals with the study of the physical and biological aspects of the ocean. It is a vast field that covers various topics such as geophysical fluid dynamics, ecosystem dynamics, waves, ocean currents, plate tectonics and the geology of the sea floor. It also includes fluxes of various chemical substances and the physical properties within the ocean and across its boundaries. Oceanography is classified into various branches such as chemical oceanography, biological oceanography, geological oceanography, physical oceanography and paleoceanography. Oceanography contributes to the understanding of processes studied in a diverse range of disciplines such as astronomy, climatology, geology, hydrology, meteorology, geography, chemistry and physics. This textbook presents the complex subject of oceanography in the most comprehensible and easy to understand language. The various sub-fields of this discipline along with technological progress that have future implications are glanced at in it. For someone with interest and an eye for detail, this book covers the most significant topics in this field.