And I am pointing out that those of us who use chain have no issues with it. I have worked on the WCML, I was part of the team who done a lot of work introducing ATG, we used miles and yards, I didn’t have any issues with it. Moving down South and getting used to chain wasn’t a problem.
Train recorded data is produced with both yards and chains, as for converting yards into chains, it’s not a problem when you do it regularly, my planners have no problem with input into Ellipse or RDMS. Also, don’t forget the train can be up to a chain, 22yds, out, or a length for those that prefer, so the odd few yard over a chain doesn’t make a difference.
I’m curious, what are your thoughts on HS1, with its KM and M? As this will be the mileage method used on HS2, there will soon be even more to work with.