Absolute error— 1. Shortest distance between the center of impact or the center of burst of a group of shots, and the point of impact or burst of a single shot within the group.
2. Error of a sight consisting of its error in relation to a master service sight with which it is tested, including the known error of the master service sight. Relative error, which is a part of absolute error, includes only the error of a sight in relation to a master service sight.