Union Fleet Headquarters

The term  officially is used to describe one of the main facilities used by Fleet Command on Pluribus Unum, Earth and Arsenal IV. Annapolis Tower in San Francisco with Fleet Operations HQ is generally considered the Main HQ as it is where the current Admiral of the Fleet Obrock Mc Elligott the highest Fleet Command Officer has his offices. (Even though it is technically on Pluribus).

The term is commonly but incorrectly used to describe the facilities from which most, of the important functions of an Number Fleet are coordinated.