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DY-100

Ancient type of interplanetary space vehicle built on Earth in the late 20th century. DY-100 vessels used nuclear-powered engines and were equipped with suspended-animation facilities for extended voyages. The S.S. Botany Bay, launched from Earth in 1996, was a DY-100 class ship. Sleeper ships like the DY-100 fell from general use by 2018 because of significant improvements in sublight propulsion technology.