|Earth Pre-Federation Database - Planetary Transport|
|Nothing is known about this large ship or airplane.
The Zeppelin-like ship or airplane seen at the beginning of ENT: "Home" is most likely designed for atmospheric flight because of its aerodynamic shape. It is plausible that in the pre-transporter age intercontinental transport predominantly relies on airplanes like this one.
Text from the Ex Astris Scientia - Bernd Schneider's Star Trek Site