Beginning in 1883, the U.S. Hydrographic Office began collecting monthly data that included navigation hazards, like derelict ships, whose locations were reported by passing vessels.
从 1883 年开始，美国水道测量办公室开始收集月度数据，其中包括航行危险，例如废弃船只，其位置由过往船只报告。
Hydrographic Office
原声例句
TED-Ed（视频版）
英语百科
List of Members of the International Hydrographic Organization
（重定向自Hydrographic Office）
A hydrographic office is an organization which is devoted to acquiring and publishing hydrographic information.
The International Hydrographic Organization has 85 members, three of these are suspended. The IHO names its member organisations hydrographic offices although the member organisations of some countries are maritime administrations covering a larger range of tasks (e.g. also oceanography, meteorology etc.)
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