Lateen (dari kata Prancis latine, artinya "Latin"[1]) atau latin-rig adalah sebuah layar segitiga yang dipasang di yard panjang yang ditempatkan pada sudut mast, dan bergerak dalam pengarahan fore-and-aft.
Bermula dari navigasi Romawi, lateen menjadi layar favorit pada Abad Penemuan, utamanya karena membolehkan perahu untuk bergerak "melawan angin". Layar tersebut menjadi hal umum di Laut Tengah, hulu Sungai Nil dan bagian barat laut dari Samudra Hindia
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Makris, George (2002), "Ships", dalam Laiou, Angeliki E, The Economic History of Byzantium. From the Seventh through the Fifteenth Century, 1, Dumbarton Oaks, hlm. 89–99, ISBN978-0-88402-288-6
Pomey, Patrice (2006), "The Kelenderis Ship: A Lateen Sail", The International Journal of Nautical Archaeology, 35 (2), hlm. 326–335, doi:10.1111/j.1095-9270.2006.00111.x
Pryor, John H.; Jeffreys, Elizabeth M. (2006), The Age of the ΔΡΟΜΩΝ: The Byzantine Navy ca. 500–1204, Brill Academic Publishers, ISBN978-90-04-15197-0
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