21. In 1825 some 736 charts and coastal views were being offered for sale by the Hydrographic Office . 22. In 1935 the Ubek were replaced by hydrographic offices subordinate to the commander of the fleets and flotillas. 23. An amendment was made to the gazettal, and the Hydrographic Office began to remove the mark from charts. 24. The U . S . Navy Hydrographic Office was sending navigational warnings to ships at sea by 1907. 25. Richard Spratly was the name reported by Captain Doyle of Australia and Captain Campbell of the Hydrographic Office 26. In 1866, an Act of Congress separated the two functions, establishing the Hydrographic Office as a distinct activity. 27. In December 2006, HMNAO was transferred to the United Kingdom Hydrographic Office , which is based in Taunton in Somerset. 28. In Hawaii from July to September, she took soundings for the Hydrographic Office and participated in various local exercises. 29. There are also products known as Sailing Directions, which are books written by various Hydrographic Offices throughout the world. 30. She sailed on 3 November 1924 to survey in the Caribbean under the direction of the Navy Hydrographic Office .
