The correct answer is D) coastal features. The Sailing Directions (Planning Guide) published by the National Geospatial-Intelligence Agency (NGA) provide detailed information on ocean routes, military operating areas, and the general ocean basin environment, but they do not contain comprehensive data on coastal features. Coastal features such as harbors, inlets, and navigational aids are typically covered in other publications like Coast Pilots, which are specifically focused on providing detailed information for coastal navigation. The Sailing Directions are primarily concerned with providing guidance for ocean voyages and basin-scale environmental conditions, rather than the specifics of coastal navigation.