The lowest-priced, brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable).Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.See details for additional description.
The bible for many generations of ocean navigators, and a bestseller for over 50 years, the 12th edition of this book is written in a concise and clear style to explain a particularly difficult skill. The book aims to make a tricky subject easy to understand, with the worked examples requiring only straightforward addition and subtraction.
The late Mary Blewitt, better known by her married name of Mary Pera, was involved with sailing for most of her life. Formerly a top ocean racing navigator as well as secretary of the Royal Ocean Racing Club for a number of years, she was also Chairman of the ISAF racing rules committee, and an international judge and jury chairman at major championships and regattas.