Ah. The old human RVR measuring device returns. Strange that in this day of super accurate GPS nav systems, and old fashioned accurate ILS, guys can still screw up. There could be a guy on the threshold with ‘bats’ guiding you in. More gizmos ain’t the answer. More professionalism might just be, and that includes the ground based links in the chain. The fault can lie in designed procedures as well as their execution.