English: Ottoman naval aviators of the Naval Flight School (Deniz Tayyare Mektebi) at Aya Stefanos; left to right: pilot Ahmet Ali (Çelikten), Sami (Uçan), İhsan and observer Hüseyin Kâmil (Görgün).
This work first published in the Ottoman Empire is now in the public domain because the Empire's copyright formalities were not met (copyright notice, registration, and deposit), or because the copyright term (30 years after the death of the author, sometimes less) expired before the Empire was dissolved (details).