TCG Demirhisar
Three ships of the Turkish Navy have borne the name Demirhisar':

  was a torpedo boat launched in 1907 for service with the Ottoman Navy. Beached in 1915 and subsequently destroyed. was a  launched in 1941 and stricken in 1960.
  was a , launched in 1964 as the submarine chaser USS PC-1639'' of the US Navy. She was transferred to Turkey in 1964. Turkish Navy ship names