What is "colonel-in-chief"

Colonel-in-Chief is a ceremonial position in a military regiment. It is in common use in several Commonwealth armies, where it is held by the regiment's patron, usually a member of the royal family. The position was formerly used in the armies of several European monarchies. A Colonel-in-Chief has a purely ceremonial role in their regiment.

The Norwegian Army has taken a more whimsical approach to the position, appointing the penguin Sir Nils Olav as a Colonel-in-Chief.