Argama

The flagship of the AEUG, the Argama was constructed in secrecy at the space colony of Sweetwater, with generous funding from Anaheim Electronics. Its appearance - with two catapult decks, retractable mega particle cannons, and extend able bridge - hearkens back to that of the legendary White Base. In place of its ancestor's internal centrifuge, the Argama is equipped with two residential modules, which rotate around the ship to provide artificial gravity. While Henken Bekkener serves as captain during its maiden voyage, the Argama is transferred to Bright Noa's command once the formers White Base captain joins the rebel ranks.

Source
Mobile Suit Zeta Gundam Viewer's Guide - by Mark Simmons