Some 43 people, including five foreigners, drowned in seas, lakes and dams in 22 provinces amid the long Eid al-Adha holiday.
According to data obtained by the state-run Anadolu Agency, 16 of those who died were children.
Istanbul and the Black Sea province of Amasya are two provinces with the highest cases, with five deaths each.
A Turkish defense firm on July 20 released images of its conceptual design for an unmanned combat aircraft system.
The images were released by the company, Baykar, on the first day in Turkey of the Muslim holiday of Eid al-Adha, or the Festival of the Sacrifice.
"We wish our nation and the entire Islamic world a healthy and happy Eid al-Adha," the manufacturer said on Twitter.