Navarch was a religious title outside the command structure of the Bajoran Militia. A Navarch was expected to report directly to the Prophets.
In early 2370, the title was given to the resistance hero Li Nalas by the Bajoran Chamber of Ministers following his rescue from the Hutet labor camp on Cardassia IV. It was specially created for him as no other title was considered worthy of his name. (DS9: "The Homecoming", "The Circle")
"Navarch" is of Greek origin and means "leader of the ship". The word admiral is translated in Greek as "navarchos."