本标准涵盖用于高精度定位、布局和检查工作的火成岩（花岗岩）板。它包括新认证、现场再认证和重新表面处理后的再认证。一般来说，本标准适用于任何尺寸的花岗岩面板。常用尺寸的信息以表格形式呈现。还包括可追溯性和测量不确定度等概念。本标准是联邦规范GGG-P-463C:1973的修订版。

This standard covers igneous rock (granite) plates for use in high accuracy locating, layout, and inspection work. It encompasses new certification, recertification in the field, and recertification after resurfacing. In general, the standard covers any size granite surface plate. Information for the sizes in common use is presented in tabular form. Concepts such as traceability and measurement uncertainty are also covered. This standard is a revision of Federal Specification GGG-P-463C: 1973.