Flag Officer-in-Command

A Flag Officer-in-Command, or FOIC, is a commissioned officer who is senior enough to be entitled to fly a flag to represent where he/she exercises command. The term usually refers to the senior officers in Starfleet, specifically those who hold the rank of Rear Admiral (lower grade) and above.

An FOIC is the Commanding Officer of a major unit or subdivision of Stafleet. This may be a task force, a starbase, a fleet, or any other command assignment of equal magnitude. As such, an FOIC performs the same duties as a CO but in a much larger scale and over several Starfleet units.