The Vic formation is a formation devised for military aircraft and first used during the First World War. It has three or sometimes more aircraft fly in close formation with the leader at the apex and the rest of the flight en echelon to the left and the right, the whole resembling the letter "V". The formation's name is derived from the term that was then used for "V" in the RAF phonetic alphabet.
The formation is still in use but has been superseded or replaced in some circumstances.