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