sentences:  With all this information, the Rangekeeper calculated the relative motion between "OWN SHIP" and "TARGET".It then could calculate an offset angle and change of range between the target's present position (LOS) and future position at the end of the projectile's time of flight.To this bearing and range offset, it added corrections for gravity, wind, Magnus effect of the spinning projectile, earth's curvature, and coriolis effect.