Sailing Directions 151 Distances Between Ports

Sailing Directions are published by the National Geospatial- Intelligence Agency (NGA) under the authority of Department of Defense. Sailing Directions, covering the harbors, coasts, and waters of the world, provide information that cannot be shown graphically on nautical charts and is not readily available elsewhere.Sailing Directions (Planning Guide) are intended to assist mariners in planning ocean passages and to eliminate duplication by consolidating useful information about all the countries adjacent to a particular ocean basin in one volume.Planning Guide publications are compiled and structured in the alphabetical order of countries contained within the region covered by each publication.Sailing Directions (Enroute) include detailed coastal and port approach information which supplements the largest scale chart produced by the National Geospatial-Intelligence Agency. This publication is divided into geographic areascalled "Sectors.".