The Ottoman Navy (Turkish: Osmanlı Donanması or Donanma-yı Humâyûn), also known as the Ottoman Fleet, was established in the early 14th century after the Ottoman Empire first expanded to reach the sea in 1323 by capturing Karamürsel, the site of the first Ottoman naval shipyard and the nucleus of the future Navy. During its long existence, it was involved in many conflicts and signed a number of maritime treaties. At its height, the Navy extended to the Indian Ocean, sending an expedition to Indonesia in 1565.
For much of its history, the Navy was led by the position of the Kapudan Pasha (Grand Admiral; literally «Captain Pasha»). This position was abolished in 1867, when it was replaced by the Minister of the Navy (Turkish: Bahriye Nazırı) and a number of Fleet Commanders (Turkish: Donanma Komutanları). After the end of the Ottoman Empire and the declaration of the Republic of Turkey in 1923, the Navy's tradition was continued under the modern Turkish Naval Forces.