|Interplanetary transport Acidalium|
|Ship Type||Interplanetary transport|
|Launched:||Cosmic Era 73|
|Ships of Class:||Acidalium|
|Propulsion:||Thermonuclear pulse thruster x 8
(interplanetary sailing unit)
Large thermonuclear pulse thruster x 12
|Armament:||positron blaster cannon x 1, 5-barrel CIWS x 12, 3-tube missile launcher x 12|
|Mobile Weapon Complement:||
GSF-YAM01 Δ Astray x1
The Acidalium is an interplanetary transport that was built at the Mars colony Australialis, for the purpose of interplanetary travel between Mars and Earth.
As the ship's mission requires it to travel long distances with no opportunity to replenish its supplies, it is equipped with a large "interplanetary sailing unit". This unit, connected to the Acidalium's rear, is roughly two and a half times longer than the ship itself, and contains three large quadruple thermonuclear pulse thruster arrays and a large fuel supply. When operating near Earth or Mars, the sailing unit is detached at an appropriate docking facility. The Acidalium is capable of atmospheric flight, and can land on a planet's surface or in any sufficiently deep body of water.
Though Mars remains neutral in the Earth Sphere's conflicts, the Acidalium is equipped with multiple weapons, all of which are concealed behind sliding hatches. Its primary armament is a positron blaster cannon in the bow. The ship also carries twelve sets of 3-tube missile launchers just aft of the main cannon, and twelve 5-barrel CIWS rotary cannons in wing-mounted pods.
The Acidalium has a very small crew, possibly as a means to conserve food, water, and oxygen during the long trip from Earth to Mars. The ship's captain is Agnes Brahe, a hot-headed Coordinator who also pilots the GSF-YAM01 Δ Astray. His second in command, Nahe Herschel, pilots the mobile armor Guardshell.
When the Acidalium arrives in the Earth Sphere in CE 73, the Acidalium docks at the PLANT capital, Aprilius One. Agnes meets with PLANT Supreme Council Chairman Gilbert Durandal, who discusses the possibility of cooperation between PLANT and Mars. Shortly after the meeting, the Earth Alliance launches a massive offensive against PLANT, and Agnes impulsively launches in his Δ Astray to assist in the defense of PLANT.
After the battle's completion, Durandal assigns TMF/A-802W2 Kerberos BuCUE Hound pilot Isaac Mau to the Acidalium as an observer, while Agnes leaves for Earth to investigate the Earth Alliance forces. This results in a confrontation with elements of the elite Phantom Pain militia, with an inconclusive duel between the Δ Astray and Phantom Pain's GAT-X105E Strike Noir being broken up when the Acidalium itself intervenes, destroying several GAT-01A2R Slaughter Daggers with a blast from its positron cannon.
The ship's next stop is Orb, where Agnes meets Chief Representative Cagalli Yula Athha and attends her wedding to Yuna Roma Seiran. When the wedding is interrupted by Cagalli's brother Kira Yamato, who uses the ZGMF-X10A Freedom to "abduct" his sister. Not knowing the true nature of these events, Agnes attempts to pursue in the Δ Astray, but is blocked by Rondo Mina Sahaku. After a brief battle, the Orb noblewoman convinces Agnes that "rescuing" Cagalli would not be the best interest of either the Chief Representative or Orb itself.
After the Acidalium departs from Orb, Phantom Pain Lieutenant Sven Cal Bayan takes command a team of five Orb pilots, with the mission of capturing the Acidalium. As the alliance between the Atlantic Federation and Orb not yet being finalized, the Orb pilots are assigned Phantom Pain GAT-01A2R Slaughter Dagger mobile suits, allowing Orb to deny participation in the mission if necessary. In the ensuing battle, three of the Orb pilots are killed and Sven's GAT-X105E Strike Noir has its Noir Striker destroyed. However, Sven utilizes the IWSP of one of the surviving Slaughter Daggers and is able to severely cripple the Δ Astray. In the aftermath of this battle, the Acidalium flees at Isaac's suggestion to Lagash, ZAFT's secret underwater supply base, for emergency repairs. Just the ship leaves, the new Martian mobile suit Turn Δ Astray descends from space, piloted by Agnes' older (technically) sister Setona Winters.
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