MIL-PRF-89201B, PERFORMANCE SPECIFICATION: HARBOR, APPROACH, COASTAL, AND GENERAL NAUTICAL CHARTS (19 APR 2001) [SUPERSEDES MIL-H-89201A]., These specifications define requirements for the National Imagery and Mapping Agency?s Harbor, Approach, Coastal and General nautical charts at all scales. This document provides the basic information necessary to standardize nautical charts in format, content and product design. Conformance to these specifications will assure uniformity of treatment among all Department of Defense elements engaged in a coordinated production program for these charts.