Star Wars Armada: Hammerhead Corvette- Rules of Play says:
Brace for impact with the Hammerhead Corvettes Expansion Pack for Star Wars™: Armada! Named for its distinctive silhouette, the Hammerhead corvette is officially classed as a transport, but features combat-worthy engines, hull, and armament. Often fielded in groups by the Rebellion, Hammerheads lend themselves to formation tactics with their agility and responsiveness. You’ll be able to explore some of these formation tactics with the expansion’s two pre-painted Hammerhead miniatures, and you’ll find them supported by two ship cards, as well as a full complement of fourteen upgrade cards heavily focused on close-range combat!