Subventilation Shaft Section B is part of a network of ventilation shafts in the Frigate Orpheon in Metroid Prime that Samus travels through after the Parasite Queen battle in order to escape the frigate. This section contains a swarm of Parasites that are most easily avoided using Morph Ball. The room cannot be revisited when the Frigate is crashed.
- Subventilation Shaft Section A (via exploding hatch)
- Cargo Freight Lift to Deck Gamma (leads to Main Ventilation Shaft Section A) (via exploding hatch)