The book is based on the (mandatory) course on Dynamical Oceanography which I gave for several years at the Institute for Marine and Atmospheric research Utrecht (IMAU) which is within the Department of Physics and Astronomy of Utrecht University, the Netherlands. I want to thank Will de Ruijter for his support of all my activities at the IMAU and for his efforts to make the IMAU such a pleasant and interesting place to work. His comments on the chapters 1 to 6 have been very valuable and for the material in the chapters 1 to 3, I have benefitted from notes of his course ‘Introduction to Physical Oceanography’.