Wiktionary
unspaceworthy
a. Not spaceworthy; unfit for a space voyage.
Usage examples of "unspaceworthy".
She was sitting on an unspaceworthy ship at a space station orbiting a world at war, and one side or the other had just demonstrated the ability to mount an attack in space, at the same time neatly cutting off this system from real-time communication with the rest of the universe.