Not sure why you are so hostile about it, this has nothing to do with arrogance but effective communication on a board with people from all over the place. "mt

Not sure why you are so hostile about it, this has nothing to do with arrogance but effective communication on a board with people from all over the place. "mt" is not a recognised abbreviation for meter, nor is it taught as so anywhere. As non-standard it just leads to confusion and questions. I for example first though it's some weird measurement unit used in marine navigation, like nautical mile. So yes, don't use mt, just use m.