The Royal Air Force rank of Air Marshal is equivalent to Vice-Admiral (Royal Navy) and Lieutenant-General (British Army and Royal Marines).
An Air Vice-Marshal is a rank in the Royal Air Force, between air commodore and air marshal, equivalent to an army major general.
An Ardian is a proposed but unadopted air-officer rank of the Royal Air Force, equivalent to air vice-marshal.
"Air Marshal" is only a rank in the Indian Air Force (IAF). The highest rank attainable in the IAF is "Marshal of the Indian Air Force" conferred by the President of India only after exceptional service (Equivalent to Field Marshall in the Indian Army). MIAF Arjan Singh is the only officer to have achieved this rank. The head of the Indian Air Force, called the Chief of the Air Staff, is currently Air Chief Marshal Fali Homi Major.
"Air Marshal" is only a rank in the Indian Air Force (IAF). The highest rank attainable in the IAF is "Marshal of the Indian Air Force" conferred by the President of India only after exceptional service (Equivalent to Field Marshall in the Indian Army). MIAF Arjan Singh is the only officer to have achieved this rank. The head of the Indian Air Force, called the Chief of the Air Staff, is currently Air Chief Marshal Fali Homi Major.
Normally, Air-Chief-Marshal Exceptionally, Marshal of the Royal Australian Air Force¹
An Air Chief Marshal is someone who belongs to the most senior rank active in the Royal Air Force.
An air commodore is a rank in the Royal Air Force between group captain and air vice-marshal, or an officer holding this rank.
Marshal of the IAF Air chief Marshal Air Marshal Air Vice Marshal Air Commodore Group Captain Wing Commander Squadron Leader Flight Lieutenant Flying Officer Pilot Officer
If you meant the highest rank, the Military is divided into three divisions, each with their own highest rank:Navies Admiral of the Fleet Armies Field Marshal Air forces Marshal of the Air Force
Marshall of the Royal Air Force. This rank however is only given out during wartime or if an RAF officer is Chief of the Defence Staff (head of all British Armed Forces) The highest rank to which officers on active service are promoted is now Air Chief Marshall
There is no rank of Marshal
Major