William G. Van Dorn has gone to sea in everything from "two barrels lashed together to an aircraft carrier" and has spent a third of a century as a research oceanographer. Recognizing the advantages of combining the knowledge of oceanography and seamanship, he created the first edition of this book.

Based on the premise that those who challenge the sea will have a better chance of survival if they have a knowledge of its characteristics, the author applies the science of physical oceanography to the practical needs of the seafaring community. The book begins with a complete discussion of the ocean's origin and nature and life at sea, and includes a discussion of meteorology, ocean currents and wave motion, and ship dynamics.

The final sections of the book deal with strategies for heavy weather seamanship and emergency procedures.

The second edition, building upon an already established reputation, has been revised to accommodate significant advances in expertise and technology. New topics include the influence of the 1979 Fastnet race disaster on racing rules and yacht design, construction, and performance; planing powerboats and open-ocean racing; ship routing for storm avoidance; search-and-rescue procedures; and cold-water survival techniques.

Although the book is slanted toward cruising yachtsmen, commercial fishing and charter boat operators will also be among its audience, and even those who may never go to sea will find it fascinating.