hydrographer of the navy
海军海道部
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为航运界提供航海服务，在七月一日回归前原本是英国海军的职责。回归后，这项工作已由海道测量部接手负责。
The Hydrographic Office has taken over provision to the shipping community of nautical services which were provided by the British Admiralty before the reversion of sovereignty on July 1, 1997.
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