The Armor class was a type of carrier fielded by the Robotech Defense Force and was one of the first human created Starships. The class was developed before Robotechnology was fully understood by Humanity and lacked some of the advances made through the study of the SDF-1. Ten Armor carriers were built by the time of the First Robotech War. Some accounts state that the SDF-2's "arms" were made up of two Armor carriers, which were destroyed along with the SDF-2 (Robotech: The Macross Saga Comic #36: To the Stars)