The Maelstrom is one of the three Grand Companies of Eorzea. The Maelstrom's base of operations is located in the Maelstrom Command in Limsa Lominsa.

At the heart of the Thalassocratic Navy lies the Lominsan Armada, composed of nine independent squadrons, the First through the Ninth. The Maelstrom is an extension of the First Squadron, expanding its role as armada flagship and granting it power to administer not only the remaining eight squadrons, but the various merchant fleets that navigate the seas off Vylbrand.

With the reestablishment of the Maelstrom, the admiral has also begun the move to invoke ancient maritime law, by which she would promote herself to Chief Admiral, effectively expanding her authority to cover not only state and military dealings, but grant her the power to directly command all ships in Lominsan waters, and freely punish any who disobey. Needless to say, the city-state's pirates are not about to take this encroachment on their freedom without a fight.