| 11. | The chair was taken by Rear-Admiral Sir Francis Beaufort, the famous hydrographer.
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| 12. | In 1960, as a rear admiral, he was appointed Hydrographer of the Navy.
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| 13. | He continued as Hydrographer until 1893.
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| 14. | However, in the 1980s hydrographer V . A . Troitsky put forward a different theory.
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| 15. | Immediately after commissioning, " Hydrographer " steamed to Adak for more survey work.
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| 16. | Miaoulis was the first Greek hydrographer, and discovered the namesake reef in the Ionian Sea.
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| 17. | On January 22, 1840, a hydrographer of his expedition, Cl�ment Adrien Vincendon-Dumoulin.
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| 18. | The name Ellice was applied to all nine islands after the work of English hydrographer Alexander George Findlay.
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| 19. | Nikolai Kolomeitsev . Matisen's friend Alexander Kolchak accompanied the expedition as third naval officer and hydrographer.
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| 20. | On the death of John Purdy, the hydrographer, in 1843, he took a leading position.
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