NaviesArmiesAir forces
Commissioned officers
Admiral of
the fleet
Field marshal or
General of the Army
Marshal of
the air force
AdmiralGeneralAir chief marshal
Vice admiralLieutenant generalAir marshal
Rear admiralMajor generalAir vice-marshal
CommodoreBrigadier or
brigadier general
Air commodore
CaptainColonelGroup captain
CommanderLieutenant colonelWing commander
Major or
Squadron leader
LieutenantCaptainFlight lieutenant
junior grade
Lieutenant or
first lieutenant
Flying officer
Ensign or
Second lieutenantPilot officer
Officer cadetOfficer cadetFlight cadet
Enlisted grades
Warrant officer or
chief petty officer
Warrant officer or
sergeant major
Warrant officer
Petty officerSergeantSergeant
Leading seamanCorporal or
SeamanPrivate or
gunner or
Aircraftman or

Admiral is one of the highest ranks in some navies, and in many navies is the highest rank. It is usually abbreviated to "Adm" or "ADM". The rank is generally thought to have originated in Sicily from a conflation of Arabic: أمير البحر‎, amīr al-baḥr, "commander of the sea", with Latin admirabilis[1] ("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 and the U.S., 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.


The word admiral in Middle English comes from Anglo-French amiral, "commander", from Medieval Latin admiralis, admirallus. These themselves come from Arabic amīr, or amīr al- (أمير الـ), "commander of", as in amīr al-baḥr (أمير البحر), "commander of the sea".[2] The term was in use for the Greco-Arab naval leaders of Norman Sicily, which had formerly been ruled by Arabs, at least by the early 11th century.

The Norman Roger II of Sicily (1095–1154), employed a Greek Christian known as George of Antioch, who previously had served as a naval commander for several North African Muslim rulers. Roger styled George in Abbasid fashion as Amir of Amirs, i.e. "Commander of Commanders", with the title becoming Latinized in the 13th century as ammiratus ammiratorum.[3]

The Sicilians and later Genoese took the first two parts of the term and used them as one word, amiral, from their Aragon opponents. The French and Spanish gave their sea commanders similar titles while in Portuguese the word changed to almirante. As the word was used by people speaking Latin or Latin-based languages it gained the "d" and endured a series of different endings and spellings leading to the English spelling admyrall in the 14th century and to admiral by the 16th century.