The Aries-class transports are used by the Federation Fleet to take Federation Marines to and from battles quickly. They can first be seen on the G.F.S. Olympus, in Metroid Prime 3: Corruption. They are later used to destroy Pirate turret emplacements, and deploy ground troops, during the Federation attack on the Pirate Homeworld. They are very similar in appearance to the Anhur-class patrol ship, which was also used as a transport vessel because of its large crew space.