The literature on Water and Maritime Navigation Law available to readers interested in this topic is, without a doubt, very scarce. Therefore, we believe that the publication of the book Law on Waterway and Maritime Navigation comes to occupy an empty space in the market of books specialized in the area of Law. But that this, the reading of this book opens to the scholars an opportunity for research of the many and varied aspects as much of the Water Law as of the Maritime Navigation. Its undeniable importance stems from the predominant role that maritime activity has played in the development of peoples. The need to lend goods more utility and desirability made man improve the means of transportation, allowing, consequently, the approximation between nations. Likewise, the scarcity of natural resources on land has forced human beings to resort more and more to existing resources at sea. By the way, many of the great advances in research in the health field stem from the exploration of the great potential for healing existing in the sea. In the author's focus, all facets of Water Law and Maritime Navigation are addressed through the emphasis given to the details of the institutes linked to them, which have been improved over the centuries. In this book, the author, without clinging to legal theories or doctrines, clearly exposes an invaluable range of information that seems indispensable to legal professionals, to people whose activity is directly or indirectly linked to the sea, especially businessmen from the maritime navigation. Jurists, in particular, are recommended to read this book, repository of rules, jurisprudence and doctrine of Waterway and Maritime Navigation Law. Certainly, this work reflects an exhaustive research effort, gathering norms of jurisprudence and doctrine specific to Water Law and Maritime Navigation. The experience gained in working in the field of Water Law and Maritime Navigation make me believe that a gap is being filled with this book, whose publication allows me to present it to the reader interested in the topic.