Where have you been for the last FIVE years?
NASA Finally going Metric? NASA went Metric in 2007!
NASA Finally Goes Metric by SPACE.com StaffDate: 08 January 2007 Time: 04:00 PM ET
They just didn't bother converting the Shuttle documentation, but every new program uses metric units of measure, even if the parts are still based on inches. Too many mix-ups with metric tonne vs imperial ton, etc.
"My Jacket gets fourty rods to the hogs head and that's the way I likes it"