The Hellenic Naval Air Service (Greek: Ναυτική Αεροπορική Υπηρεσία) or ΝΑΥ was the air arm of the Hellenic Navy from 1915 to 1930.The first aviation units in the Greek Armed Forces were formed in June 1912. In the following Balkan Wars, the Hellenic Navy was the first in military history to use aircraft to track down and bomb the enemy fleet (1913). The Naval Air Service was officially established during the First World War and participated with the Allies in several missions over the Aegean.