MIL-STD-1839D描述了为所有系统、子系统和设备的校准和测量可追溯性提供方法的要求。从这一点开始，在本文件中，“系统”一词将指系统、子系统和设备。这确保了系统运行的完整性和准确性。它定义了建立从实际系统级测量到国家标准与技术研究所（NIST）或其他批准测量源的测量可追溯性的要求。

MIL-STD-1839D describes the requirement to provide a means for calibration and measurement traceability of all system, subsystem, and equipment. From this point on in this document, the word system will refer to system, subsystem, and equipment. This ensures system operational integrity and accuracy. It defines the requirement for establishing measurement traceability from actual system level measurements to the National Institute of Standards and Technology (NIST) or other approved measurement sources.