So I am watching this Baltimore/Pittsburg game and they just challenged a spot, respotted, and remeasured to see if it was a first down (it was). I have always thought that this measurement stuff is hilarious that they are so inexact with spots and so exact with measurements (see that hilarious Alabama gif), but unless you add technology to the football I am not sure what else you could do.
The question I have is when the ball is not near any of the hashmarks, how do they guarantee that the chains are straight up the field? When some of these measurements come down to an inch or two, it wouldn't take much to shorten the 10 yard distance if they were off by a degree or two or 5. It seems like there really isn't anything other than just eyeballing it, but if anyone has any insight into this I'd love to hear it. Any officials out there?