Paul Elvstrom is arguably the greatest Olympic sailor of all time. Proving that understanding the rules is crucial to winning, he devised this unique approach to explaining them using bird's-eye diagrams. His detailed explanations are applied to myriad racing situations, each cross-referenced to relevant case studies provided by World Sailing (formerly ISAF). Included with the book are a set of plastic boats, for use during protest hearings. They are transparent but coloured differently so can also be used with an overhead projector. This edition is completely revised to cover the new rules issued for 2025-28. It includes the full text of the latest rules, with a handy quick-reference guide highlighting the latest changes. There is also a confidence-building section on how to present your case in a protest, and the back cover shows the signal flags for instant easy reference on the race course. Long established as the most accessible and most trusted guide to the racing rules, Elvstrom Explains is a must-have. Whether racing in a dinghy, keelboat or large yacht, it is the perfect pocket reference for those who want to win.