X: xe'ls, x-301, x-302, x-303...

[Vern]

Xe'ls
Xe'ls was guardian spirit of the Salish on PXY-887, taking the form of a black bird. The Salish learned of his true humanoid identity in the season two episode "Spirits". Xe'ls was played by Alex Zahara.

[River]

X-301
The first "human" built aircraft that was spaceworthy. Though it was only a modified deathglider. And it was a flop as was seen in "Tangents"

X-302
The first entyrely human built air/spacecraft. That was supposed to have hyperspace capasity. Well it can leep short leeps in hyperspace. First shown in "Redemption, part 1" See also F-302

X-303
See 'Prometheus'.

[Hawkeye]

X-304 - See Daedalus Battlecrusier class