H10771: NOS Hydrographic Survey , Approaches to Portsmouth, New Hamsphire, 1997-10-02
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The National Oceanic and Atmospheric Administration (NOAA) has the statutory mandate to collect hydrographic data in support of nautical chart compilation for safe...
美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，简称NOAA）负有法定职责，需收集水文数据以支持海图编制，保障海上航行安全……
