This comprises virtually everything you would need to navigate celestially should the need (or desire) arise. It is not the best book for beginners, because the sight reduction methods do not follow those you would find in traditional texts, or in classes they may take. We don¹t recommend buying this book just to save a few dollars on standard tables, but rather to satisfy your interest in a clever and compact system. Some accuracy is sacrificed over traditional methods, but this should not be noticable aboard a small boat. SC, 176 pages, 2007. SW 1.5 lbs.