high reach lift LGVs, fork LGVs, conveyor-bed LGVS and reel LGVs. A laser sensor within a rotating turret is mounted atop the AGV. Laser is constantly transmitted & received by the same sensor. The angle and (sometimes) distance to any reflectors that are in line-of-sight are automatically calculated and triangulated to give the current position of the AGV. The AGV compares this to the known map and path, then steering is adjusted to keep on track, with this constantly updated positioning.