"SDF-01" , The First MacroSS of The 'MACROSS' Series. Actually stood for initials, Macro-sized Space Ship. SDF stood for Space Defense Force, although some claim it was Starship (of the) Deep-Frontier. either way it was Earth's first deep space starship, salvaged and re-engineered for human beings after it crash landed on an island in the Pacific Ocean. btw: forget even trying to watch RoboTech, see the original Japanese version instead. It makes way more sense.