Charles – who became the inaugural holder of the title 32 years ago – met with his eldest son in a rare joint official engagement at the Army Flying Museum in Middle Wallop, near Andover, on Monday afternoon.
The monarch officially handed over the role of Colonel-in-Chief of the Army Air Corps to the Prince of Wales in the ceremony.
The King became the inaugural holder of the title 32 years ago.He unveiled a plaque commemorating an Apache AH Mk.1 going on display, the first of its kind to be installed at a UK museum.
The aircraft was one of four involved in a rescue mission during the Battle of Jugroom Fort in 2007.
He said: “Let me just say what a great joy it is to be with you even briefly on this occasion but also it is tinged with great sadness after 32 years of knowing you all, admiring your many activities and achievements through the time that I’ve been lucky enough to be Colonel-in-Chief of the Army Air Corps.”