Generation Ships

[Lamech]

Originally Posted by jeff_wilson

TL8 can't make a self-contained human-suitable biosphere that will last more than a few years if that. The canonical GURPS generation ship treatment is in BIOTECH for 4/e.

Spaceships disagrees with you. You can make a generation ship starting at... TL 7. That said spaceships is horribly optimistic about everything. However nothing really prevents a generation ship at TL 7 according to spaceships.