A method, device, and computer program for determining range to a target
is disclosed. Specifically, the invention provides a method, device and
computer program for determining a second range to a target based on a
first range to the target and an angle to the target such that the
parabolic trajectory of a projectile is accounted for in determining the
second range. The device generally includes a range sensor for
determining a first range to a target, a tilt sensor for determining an
angle to the target, and a computing element for determining a second
range to the target based on the first range and the determined angle.