The Case Book details interpretations of The Racing Rules of Sailing. It has been published by the International Sailing Federation for over 40 years and is available to download online or purchase from the ISAF Secretariat.

The Case Book complements The Racing Rules of Sailing (RRS), providing details on the application of the RRS to around 100 scenarios. The principal aims of the Cases are to clarify an important meaning in a rule or to increase the understanding of a complex rule.

A revised edition of the Case Book is published every four years to coincide with the publication of The Racing Rules of Sailing. Then, in each of the following three years a supplement to the Case Book is published.

You can download the latest version of the Case Book and the supplements to the Case Book (when available) using the links below or click here to purchase a printed version.

The latest version is the Case Book 2013-2016.

**note: Case Book updated on 17 May to correct typographical errors.