Yggdrasil

The Yggdrasil is a vessel from Xenogears. It is a sand submarine used by Bart and the Sand Pirates and acts as the main base of operation for the party throughout the game.

Description
The predecessor to the Yggdrasil was designed by the first king of Aveh, Raganbart I, and was tentatively named C-Kaiser (using German lettering). The vessel type was officially called Sigrid, after the wife of Raganbart, but this had been changed by the days of Bart's father Edbart IV. At that time it was drydocked away with a second ship and sealed away. During the chaos that occurred when Shakhan launched his coup against the Fatima dynasty, both ships became missing. The first became the first Yggdrasil as seen in the game. After its the destruction the second Yggdrasil was used as its replacement for the remainder of the game. Both ships were equipped identically until modifications were made to the Yggdrasil II.

The Bart Missile was equipped as a large scale anti-aircraft assault weapon aboard the Yggdrasil II. It was set up to be able to be used during both air and sea battles. Its predecessor was the Gungnile Missile which was part of the Aveh artillery. Bart did not change the design or set up of it, but rather just the name. Due to its great destructive power, two thirds of the commanding officers on the ship are supposed to be in agreement (which is ignored by Bart during the game).

The Yggdrasil is made up of five interior modules, the command center (bridge), the engine section (center), the weapons division (upper), the supply division (lower fore decks) and the final one which was made up of the sand granulators, flow pumps, outer ring propulsion and other sundry machinery (aft). Each of these modules is capable of functioning independently. While the command center and weapons divisions lack support facilities, they can separate themselves.

Eventually the second Yggdrasil would be upgraded and restructured at Shevat, being renamed the Yggdrasil III. It was equipped with a series of giant boosters in its tail, as well as large scale propulsion wings. As such, it had the ability to fly at great speeds. Its booster is unable to activate during flight. When the Yggdrasil IV is in Gear form, the Yggdrasil III acts as a large cannon for it. The booster changes shape and develops a rifle stock that is held during firing. While linked with the Yggdrasil IV, the Yggdrasil III has an energy charge similar to Seibzehn's Gravity cannon.