Policies and practices of the Army Map Service in showing standard grids and grid data on military maps including British, American Polyconic, and United States domestic grids, the content and composition of declination diagrams and notes, grid protractors, the treatment of various grid intervals, overlapping grids, grid notes and reference boxes.

In accordance with AR 300-15, this manual serves as standard specifications for establishing map identifications and for designing other marginal data on maps prepared by the Army Map Service (AMS) and all other mapping units under the direct control of the Chief of Engineers. This manual also explains the identification on maps of other origins which are to be reprinted or stocked by the above mapping units, and further describes required changes in identifications and other marginal data when reprinting such maps. An appendix describes the identifications and general characteristics of AMS publications dealing with mapping. This manual supersedes all previous instructions on the subject.