Flag officer

A flag officer refers to an officer with the rank of Commodore/Rear Admiral or higher.

Flag officer ranks in Starfleet

 * 1) Fleet Admiral
 * 2) Admiral
 * 3) Vice Admiral
 * 4) Rear Admiral (aka Real Admiral, upper half)
 * 5) Commodore (aka Rear Admiral, lower half)

Flag officer ranks in the Confederation of Earth
These flag ranks are featured on Star Trek: Confederation, the top three are Council Flag Officers and the bottom two are Division Flag Officers (Star Trek: Confederation)
 * 1) Commander-in-Chief Black Uniform (Council Officer)
 * 2) Vice-Commander-in-Chief Black Uniform (Council Officer)
 * 3) Fleet Admiral Black Uniform (Council Officer)
 * 4) Admiral Division Colors Uniforms (Science, Operations, Command)
 * 5) Rear Admiral Division Colors Uniforms (Science, Operations, Command)