Hangar C-01

 is a generic United Nations Space Command term for one of the two-story Longsword and Pelican hangers below the MAC gun on an Orbital Magnetic Accelerator Cannon Platform.

Cairo Station Hanger C-01
During the First Battle of Earth, SPARTAN-117 was able to take the Covenant bomb from Firing Control by wresting it from the hands of its Elite and Grunt guards, move it to, and then activate the airlock door, explosively decompressing the bay. The SPARTAN-II was miraculously able to guide his trajectory to intersect with the damaged engine of a nearby unshielded Covenant Assault Carrier. He then drifted away to and detonated it, destroying the heavy warship.