>>15422171>literally how?With the inch as the base unit, divisible for whatever scale you need, as tenths, hundredths, thousandths, etc.
This is what we use for precision measurements in machining and probably other applications though I can't think of any off the top of my head.
We also use decimal foot for intermediate measurements but this is fairly uncommon, mostly used for surveying. The only time I've used it is for shooting elevations at work.