Punic-class supercarrier
From Halopedia, the Halo wiki
The UNSC Supercarrier was a heavy warship classification within the UNSC fleets. There was only a few constructed, one of these was the UNSC Trafalgar, which fell at the Battle of Reach. This warship classification is more Powerful than evan the UNSC Marathon-class Cruiser and the carrier class. The keel length is almost double that of the Halycon heavy cruisers. Able to take more punch than the cruiser classification and the standard UNSC carrier, this ship is almost indestructible with 10 meters of Titanium A armour.