Originally published in Russian, this book is the first major Russian treatise on the international law of the sea in the post-Soviet era. The book covers the legal status and legal regime of the sea expanses and follows their classification in the 1982 United Nations Convention. In addition, a separate section is devoted to the legal status of the Caspian Sea. The author analyzes in-depth the international legal norms regulating the preservation of the marine environment and concludes that a system of international cooperation is essential both in the sphere of navigation and economic exploitation of oceanic resources. Extensive attention is given to Russian practice. As Russia plays a central and influential role in world maritime policy, a book that specifically deals with Russian approaches in this field cannot fail to be of importance to anyone interested in the law of the sea.