Guide Steps
Step 1: Scan Rebreather fragments in Dolerite Spires
Dolerite Spires is a biome characterized by tall, dark rock pillars. Locate wrecks within this biome — Rebreather fragments are cylindrical components near wreckage. You typically need to scan 2 fragments to unlock the blueprint. Dolerite Spires is at shallow to mid depth, accessible after you have a Standard Air Tank.
Step 2: Craft Fiber Mesh
Fiber Mesh = 2 Fiber + 1 Strong Acid. Fiber is harvested from Fiber plants found in the Shallows and other biomes. Strong Acid is crafted from 2 Acidic Raion Pouches in the fabricator. So each Fiber Mesh requires: 2 Fiber + 2 Acidic Raion Pouches. You need 2 Fiber Mesh for the Rebreather = 4 Fiber + 4 Acidic Raion Pouches total.
Step 3: Craft the System Chip
System Chip = 1 Wiring Kit + 2 Quartz. Wiring Kit = 1 Silver + 1 Copper Wire (Copper Wire = 2 Copper Ore). So the full chain: 2 Copper Ore → Copper Wire, Copper Wire + 1 Silver → Wiring Kit, Wiring Kit + 2 Quartz → System Chip. Silver comes from caves ~290-350m north of Lifepod. Quartz from Coral Domes.
Step 4: Assemble the Rebreather
Fabricator → Equipment → Rebreather. Requires: 2 Fiber Mesh + 1 System Chip. The Rebreather is a head-slot item — it works passively with no power or activation needed. Once equipped, oxygen consumption is normalized across all depths.
How the Rebreather improves deep diving
Without a Rebreather, oxygen depletes faster at depth — at 100m you might consume oxygen 2-3x faster than at the surface. The Rebreather normalizes this, giving you consistent oxygen consumption regardless of depth. This effectively doubles or triples your effective dive time at 100m+. Combine with the Standard Air Tank (45s → 75s oxygen) for maximum deep exploration capability.