[Someone]

I don’t think it’s that uncommon. For one thing, it is listed in the NIST Guide to the SI (https://www.nist.gov/pml/special-publication-811/nist-guide-...)

It also, IMO, beats acre-foot as a generic way to describe volumes (who even knows an acre is a chain by a furlong?)

[brnt]

The length of a mile varies across jurisdictions though. You'd think the world atlas would be mindful of the gap.