Transit Tunnel South is a room in the Torvus Bog in Metroid Prime 2: Echoes. It is an underwater Morph Ball tunnel that features various currents of water running up and down. Samus must use various Bomb Slots to change the course of the water so she can receive a Missile Expansion.
- Missile Expansion
- Use the currents and activate all the bomb slots to reach the expansion.
- Kinetic Orb Cannon
- "Kinetic Orb Cannon system active.
- Enter the hologram in Morph Ball form to use the system."