A thoroughly modern and up-to-date book which runs through all the basic techniques for using GPS to maximum advantage in navigation - in daylight, darkness and in fog. Most powerboat and sailing yacht navigator now use waypoint navigation, but there are many wrinkles and fine-tuning tips to be gained from this book. Bill Anderson was for many years the Cruising Secretary of the RYA and played a key role in setting up their Yachtmaster syllabus.