Commons R-01

, also named Commons Red, is a generic United Nations Space Command term for one of the commons modules on the port side of an Orbital Magnetic Accelerator Cannon Platform. It consists of a standard-sized rectangular room, with "islands" regularly spaced to the edges of the room. Security R-01 overlooks Commons R-01.

Cairo Station Commons Red
Cairo Station Commons Red was the United Nations Space Command portside commons of Cairo Station further from the bridge.. During the First Battle of Earth, Covenant boarders invaded Commons Red, hampering SPARTAN-117s efforts at getting to the Covenant Bomb.