Seydi Ali Reis

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Seydi Ali Reis
Born	1498 Galata, Ottoman Empire
Died	1563 Constantinople, Ottoman Empire
Nationality	Ottoman
Known for	Writing several books of travel, navigation and astronomy

Seydi Ali Reis (1498–1563), formerly also written Sidi Ali Reis and Sidi Ali Ben Hossein, was an Ottoman admiral and navigator. Known also as Katib-i Rumi, Galatalı or Sidi Ali Çelebi,^[1] he commanded the left wing of the Ottoman fleet at the naval Battle of Preveza in 1538. He was later promoted to the rank of fleet admiral of the Ottoman fleet in the Indian Ocean, and as such, encountered the Portuguese forces based in the Indian city of Goa on several occasions in 1554. Seydi was able to unite several Muslim countries on the coast of the Arabian Sea (such as the Makran Kingdom, Gujarat Sultanate and Adal Sultanate) against the Portuguese.

He is famous today for his books of travel such as the Mir'ât ül Memâlik (The Mirror of Countries, 1557) which describes the lands he has seen on his way back from India to Constantinople, and his books of navigation and astronomy, such as the Mir’ât-ı Kâinât (Mirror of the Universe) and the Kitâb ül Muhit: El Muhit fî İlmi'l Eflâk ve'l Buhûr (Book of the Regional Seas and the Science of Astronomy and Navigation) which contain information on navigation techniques, methods of determining direction, calculating time, using the compass, information on stars, sun and moon calendars, wind and sea currents, as well as portolan information regarding the ports, harbours, coastal settlements and islands in the various regions of the Ottoman Empire. His books are translated into numerous languages including English, French, Italian, German, Greek, Arabic, Persian, Urdu, Russian and Bengali and are considered among the finest literary works dating from the Ottoman period.