This work investigates the intersection of recreational sailing and marine observation, providing a framework for yachtsmen to document and understand the biological life encountered during their voyages. The authors, Maldwin Drummond and Paul Rodhouse, combine their expertise in maritime navigation and marine biology to offer a practical guide for the amateur naturalist at sea. The text emphasizes the role of the sailor as a citizen scientist capable of contributing meaningful observations to the broader study of ocean ecosystems.

The subject matter points to a specialized, practical reference text designed for the intersection of maritime hobbyists and naturalists. The framing suggests an accessible, observational approach that prioritizes field utility for those spending significant time on the water.