The Heimdall-class Frigate was the first new ship design of Reyes-McLees Shipyards prior to the Remnant War, being a test bed for what was soon to be normal technology for capital ships. Sangheili and Huragok technicians finally created not only highly improved reactors, but also an adaptable shield generator, making it the first UNSC vessel to be outfitted with an energy shield. Outwards, it appeared little different from the older frigates of the UNSC and retained similar armaments.