Magazine 1 is the main ammunition storage and loading centers, providing the six main cannons, as well as the Gauss Cannon, with ammunition. The weapons do not actually extend into the Magazine. Ratings load the rounds or charges with computer commands, though manual reloading is required. Magazine 1 takes up the forward half of Deck 12, as it holds a myriad of weapons ammunitions, as well as missiles and torpedoes.

Magazine 1 is one of the two most armored sections of the ship.