Patent ID: 8448372

Claim:
A portable system for facilitating inclined shooting of a projectile weapon, comprising: a ranging system for measuring a line-of-sight range from a vantage point to a distant target that is elevated or depressed relative to the vantage point; an inclinometer mounted in alignment with the ranging system for measuring an inclination of a line of sight between the vantage point and the target; a memory for storing a ballistic characteristic representative of a selected projectile; and a processor in communication with the ranging system, the inclinometer, and the memory, the processor configured to: use the line-of-sight range, the inclination, and the ballistic characteristic to determine a trajectory parameter corresponding to the selected projectile at the line-of-sight range if shot from the vantage point at the target; and use the trajectory parameter and the ballistic characteristic to determine an equivalent horizontal range to a theoretical target located in a horizontal plane intersecting the vantage point, whereat the selected projectile would have the trajectory parameter if shot from the vantage point at the theoretical target.