Description: We propose a tactical grade MEMS IMU for spin-stabilized rockets for metric tracking and autonomous systems. The enabling instrument is a gyroscope designed for very low cross-axis sensitivity. The IMU is formed by integrating all the gyroscopes and accelerometers on a single, planar chip. An advantage of integration is the well-defined alignment of all instruments with respect to the spin axis. During Phase I we propose to design and fabricate a complete IMU and conduct a proof-of-concept test of the enabling gyroscope under high, cross-axis spin rate.