طنب الكبرى
Ahmad Khan Daryabeigi () graduated from Dar ul-Funun school with degrees in engineering and military studies. His research in 1887 provided the landscape for official Iranian claims to its three island (Greater and Lesser Tunbs and Abu Musa). During Naser al-Din Shah Qajar, he became the first Iranian captain of the Persepolis Battleship in Bushehr which recently Iran had purchased from Germany and designed the first Iranian Navy uniform and later became the Lord Admiral (Maritime Frontier-Keeper)of the Persian Gulf. In 1893, about 22 years before the First World War, he became the Governor of Bushehr and Southern Ports and Ommanat. In March 1899, he conquered Port of Lingeh (Bandar Lengeh) and returned it to Iran’s sovereignty.