This standard provides a source of definitions of terminology used in the development@ manufacture@ and test of inertial instruments used for navigation@ guidance@ orientation@ stabilization@ and related applications. This is a companion document to IEEE Std 1559? Purpose There is no consistent definition of terms that have arisen in the evolution of inertial instruments. This standard is intended to serve as a basic reference for producers and users of such instruments@ for preparing industry standards@ and for the interpretation of published technical reports.