Measuring apparatus and instruments; sensors; motion sensors; position sensors; acceleration sensors; gyrometers; gyroscopes; calibration devices; industrial calibration sensors; electronic navigation systems; inertial navigation systems; inertial navigational instruments; inertial measurement units comprising accelerometers and gyrometers; inertial navigation systems supported by GNSS, barometric, pressure, magnetic, distance-measuring (radio, sonar), and/or camera-based technologies; comput...