| 11. | Under direction of the Hydrographic Office she conducted surveys in Mexican and Caribbean waters.
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| 12. | The chart datum varies according to the standard used by each national Hydrographic Office.
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| 13. | In 1874 he was named section-chief in the hydrographic office of the Admiralty in Berlin.
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| 14. | A buoy floats over the wreck, placed by the Hydrographic Office of the United States.
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| 15. | ECC ( Electronic Chart Centre ) and United Kingdom Hydrographic Office were the original contributing organizations.
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| 16. | Many hydrographic offices provide regular, sometimes weekly, manual updates of their charts through their sales agents.
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| 17. | Aubrey requests suspension from the Navy List, and is put on loan to the hydrographic office.
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| 18. | In 1920 the US Hydrographic Office merely refers to the reef as the " Northwest Reef ".
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| 19. | The logo began as a 1906 bookplate designed in the U . S . Naval Hydrographic Office.
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| 20. | Some nations'hydrographic offices have defined their own boundaries; the United Kingdom used the 55�S parallel for example.
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