You choose the way down
The map table in the cockpit shows a branching route tree. You see two depths ahead, and every node tells you what's waiting: biome, task, haul — and what's working against you. Thin air that burns through your stamina. Acid that drains gas mask cartridges three times as fast. Overcrowded breeding grounds.
More than twenty of those are scattered across the tree. The crew votes. Nobody goes back.