Yonada
- Generational ship dispatched from Fabrina to Lorina upon the discovery of the coming supernova of that world's primary (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Construction began c.8015 BCE, following invitation by the Tishiki civilization (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina; TNG Novel: The Buried Age)
- Departed 7954 BCE (TOS Novel: Ex Machina)
- Arrived 2270 (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Named for the Fabrini word for "hope" (TOS Novel: Ex Machina)
- Outer shell of kelbonite-victurium alloy covered by molten asteroid fragments to provide greater radiation shielding, approximately 325km in diameter (TOS Novel: Ex Machina
- Central core constructed of asteroid collapsed on itself via shaped antimatter explosions and coated in a layer of diamond, resulting in a sphere with density nearing 400 g/cc, in order to provide artificial surface gravity of 0.86g, near-identical to gravity of Lorina (TOS Novel: Ex Machina)
- Resulting core 307km in diameter, held in place to outer shell by supports camouflaged as tall mountains (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Formerly directly inhabited, but following ecological collapse on the surface c.3400 BCE, all Fabrini had relocated to below the surface (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Propelled by fission-based thrusters (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Malfunction in thrusters resulted in Yonada entering a collision course with Kachissat until returned to its proper course through uneasy cooperation with crew of USS Enterprise (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Fabrini descendants were by then unaware of the status of Yonada as a vessel rather than a planet (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- Following the surface ecological collapse, Yonadi were placed under the control and governance of the Oracle (TOS: "For the World is Hollow and I Have Touched the Sky"; TOS Novel: Ex Machina)
- During the underground era, upper-class people were allowed lodging near the surface, while lower-class were forced into lower chambers (TOS Novel: Ex Machina)