Ruma-pattern light carrier
From Halopedia, the Halo wiki
Template:Ratings Template:Ship
The Covenant Carrier[1] is a heavy warship classification within the Covenant Navy. It is 1,455 meters long[2] and is armed with Pulse Laser turrets and two plasma torpedoes.
Its primary role in combat is to dispatch single ship starfighters and other smaller ships, as it boasts three squadrons of Seraph fighters[3], two hundred Banshees and thirty-four Spirits and Phantoms. These ships are carried in the thirteen launch bays.[4]
It is most likely a more powerful warship overall. Alternatively, it is likely used for command and control of large numbers of warships and deploying waves of starfighter craft.
There may be some dispute over the length of the Carrier, for example in Halo: Ghosts of Onyx, it mentions that the Incorruptible, a Reverence-class Cruiser, which is 3000 meters long, took cover behind the Carrier Lawgiver. However, the Incorruptible merely took cover behind the other ship, using the Carrier's shields as a barrier to protect itself.