Reading the PDF, one imagined hands—the hands of technicians, inspectors, and calibrators—handling micrometers, dial indicators, laser sensors. The document anticipated mistake and offered remedies: how to record environmental conditions, how to mitigate hysteresis, how to document uncertainty. It acknowledged human and instrument fallibility with the calm of someone accustomed to small, consequential errors. There were admonitions against sloppy practice and, quietly woven in, respect for method: the standard did not absolve responsibility; it distributed it, evenly, across procedure and record.