The fleet survives partly because the script gives it unusually useful specialist ships. The proposed evacuation fleet would use large, broadly standardized vessels, perhaps close to Galactica's size. Roughly one-third of their internal volume might be devoted to food, water, air, stores, and hydroponic gardens. Each ship would carry resource-gathering craft, while fighters would intercept attackers at distance so damage never reaches the life-support-heavy refugee vessels. Distributing these capabilities would reduce the chance that one auxiliary loss collapses an essential fleet-wide service.
Chapter ยท 43:32-46:31
Designing a fleet for planetary evacuation
Purpose-built evacuation ships need distributed life support, hydroponics, mining craft, and fighters that keep threats away from fragile lifeboats.