Abstract: A projectile which would ordinarily be a spinning artillery shell is segmented so that the forward segment can be deflected relative to the rear segment for aerodynamic directional corrections in flight. Fins provide the projectile spin and a motor in the rear segment rotates an angle drive means with a velocity equal and opposite to the rotation of the rear segment, so that the angle drive means can establish an angle which has a fixed orientation on an earth coordinate reference frame despite the spinning of one or both portions of the projectile. Ground or sea-based radio and radar communications or an on-board roll reference system continuously communicates with the projectile, informing it of its own rotation rate and providing command signals for the nose deflection needed to establish the proper real-time trajectory correction.