H11846: NOS Hydrographic Survey , Approaches to Sitka, Alaska, 2008-06-18
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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,NOAA)具有法定职权,负责收集水文数据以支持用于保障……安全的海图编制工作……



