arekbulski
commented
6 years ago I think this would be not a good idea. Entire point of having SI units was to unify the world standard. This will only pile more code (because we need more sloc...) and benefit not many people.
There is a mod for this, affects navball, not KER https://forum.kerbalspaceprogram.com/index.php?/topic/68202-13-speed-unit-changer-more-units-for-your-speed-ap-pe-on-your-navball/
Add ability to display speed in km/h, knots, mph and probably other units