The SDF-1 Macross is a fictional spaceship from the anime series Macross, which first aired in 1982. It serves as a mobile fortress and is designed to protect Earth from alien threats. The ship is notable for its ability to transform between a battleship and a humanoid robot, known as a Destroid. The SDF-1 is equipped with advanced technology, including powerful weapons and a fold system that allows for faster-than-light travel. Its story revolves around the crew's struggles to defend humanity while dealing with the complexities of war and relationships, particularly with the alien race known as the Zentradi.