Pilot chart

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pilot chart

A chart of a major ocean area that presents in graphic form averages obtained from weather, wave, ice, and other marine data gathered over many years in meteorology and oceanography to aid the navigator in selecting the quickest and safest routes; published in the United States by the Defense Mapping Agency Hydrographic/Topographic Center from data provided by the U.S. Naval Oceanographic Office and the National Environmental, Satellite Data and Information Service of the National Oceanic and Atmospheric Administration.

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