Using the successful programmed learning format that proved so effective in his coastal navigation coursebook, Gerry Smith teaches the reader the basic skills needed to take sun sights and shows him how to use tables to find a position. The reader is able to evaluate performance immediately and will benefit from the pattern adopted throughout: learn, test, assess, relearn, progress. This book will be greatly appreciated by all those who have been traumatized by the usual complex books on celestial navigation.