Admiral is one of the highest ranks in some navies, and in many navies is the highest rank. The rank is generally thought to have originated in Sicily from a conflation of Arabic: أمير البحر, amīr al-baḥr, "prince in Arabic; supervisor in Turkic; (commander) of the sea", with Latin admirabilis ("admirable") or admiratus ("admired"), although alternative etymologies derive the word directly from Latin, or from the Turkish military and naval rank miralay. The French version—amiral without the additional d—tends to add evidence for the Arab origin. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army, and is above vice admiral and below admiral of the fleet, or fleet admiral. In NATO, admirals have a rank code of OF-9 as a four-star rank.