2021. ARCTIC OCEAN. - This book is the official US document. Sailing Directions include relevant physical, political, industrial, navigational and regulatory information about the countries adjacent to a particular ocean basin in a single volume. SAILING DIRECTIONS are prepared and published by the U.S. NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY (NGA). 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 include detailed coastal and port approach information which supplements the largest scale chart.
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