As a woodworker, I actually find English/American units more accurate - millimeter is the smallest size you can easily measure with Metric but with English units you can get down to 32ths and 64ths. The math is easier with Metric. I think that shipping will most likely continue to use nautical miles which doesn't really match Metric or English units. A nautical mile is approximately 2000 yards (2025), 1852 meters, or one minute of latitude.
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