No they don't. They need fairly coarse tracking (A few feet or so.) for geolocation as that is only to make sure you end up covering the whole field. Now for i

No they don't. They need fairly coarse tracking (A few feet or so.) for geolocation as that is only to make sure you end up covering the whole field. Now for individual weeds you need precise aiming but that's only from a few feet away at max. The overall geo location boils down to being able to track a row as you go down it and then go to the next row at the other end. The lasers don't care about the geo location at all.