
Visible crew/equipment: After D'Argo finds the Peacekeeper control panel and rips out the wire, he's thrown back and slides down a shaft. When he stops sliding we can see the safety cable behind him just before he finds the Peacekeeper shield, and then when he continues to slide down the shaft we can see the safety cable once again.
Chosen answer: It's never explained. John mentions a theory that his less technologically developed craft simply interferes with the wormhole less than the "superior" Vipers, but they never make a concrete determination on that point. But we also have to take into account the fact that Moya traverses wormholes with no ill effect as well.
Garlonuss ★