The primary focus of Fundamentals of High Accuracy Inertial Navigation is on the physical and mathematical principles forming the basis for inertial navigation. It differs from other books on the subject by treating aspects of the blend of inertial navigation technology and geodesy. Accuracy criteria and evaluation are also discussed. Fundamentals of High Accuracy Inertial Navigation is divided into three parts: inertial navigation, inertial navigation with aids, and accuracy analysis. The first two parts are designed to give the reader an understanding of the fundamentals without requiring knowledge of the statistical analysis techniques involved in determining the effects of errors on accuracy. The third part defines the criteria for determining accuracy and then leads the reader through the complex process of that determination. This book is intended for the third- or fourth-year engineering student, as well as professional engineers or scientists trained in mathematics, control theory, analytical mechanics, geodesy, or physics, who have a need for understanding the basic principles of inertial navigation technology.