Punic-class supercarrier
From Halopedia, the Halo wiki
The UNSC Supercarrier is a heavy warship classification within the UNSC fleets. There were only a few constructed, the only one mentioned is the UNSC Trafalgar, which fell at the Battle of Reach. This warship classification was likely to be on the same level as the UNSC Marathon-class Cruiser or higher in terms of overall power. This ship would of been one of the most powerful ships if not the most powerful ships made by the UNSC known to date because not only it says that it was in overall power of a cruiser but it would have the troop and fighter deployment abilities of a carrier making the ultimate weapon against the covenant in space combat
