Adjusting any device, such as a launcher, gun mount, or sighting equipment, so that all horizontal or vertical angles will be measured in the true horizontal and vertical planes.

A method of performance rating which seeks to rate the principal factors that cause the speed of motions rather than speed itself; it considers that the level at which the operator works is influenced by effort and skill.

Flattening rolled sheet by evening out irregularities, using a roller or tensile straining.

Measurement of rises and falls, heights, and contour lines. Also known as gallery.