Method of determining heading by turning an inertial device

Abstract

A method of determining a heading by means of an inertial device (1) providing measurements by means of at least one vibratory gyro (3), the method comprising the steps of: • positioning the inertial device in such a manner that the gyro extends close to a plane that is substantially horizontal; • orienting the inertial device successively in a predetermined number of orientations about a vertical axis, the predetermined number being greater than one; • for each orientation, adjusting the electric angle of the vibratory gyro to a predetermined value, the predetermined value of the electric angle being the same for all of the orientations of the inertial device, and taking a measurement; and • determining the heading from the measurements and an angle between the orientations.

Dependencies are inferred from the claim text.