Rebreather
Definition
A rebreather is a closed or semi-closed circuit scuba system that recycles exhaled gas by removing carbon dioxide and adding oxygen.
More on Rebreather
Rebreathers differ from traditional open-circuit scuba in that they allow divers to reuse the gas they breathe, making them much more efficient. This significantly extends dive times and reduces bubbles, making them ideal for underwater photography and military applications. There are two main types: closed-circuit rebreathers (CCR) and semi-closed (SCR). CCRs automatically manage oxygen levels and require training due to the complexity of gas management and risk of hypoxia or hyperoxia. They also require meticulous maintenance.
Frequently Asked Questions
They extend bottom time, reduce gas usage, produce few bubbles (ideal for wildlife), and can improve decompression efficiency.
No. Rebreathers are complex and require specialized training and experience to operate safely.
Dive times can reach several hours depending on scrubber duration, oxygen supply, and dive profile.
It’s a chemical filter in the rebreather that removes carbon dioxide from exhaled air, preventing toxic buildup.
Daily inspection, cleaning, sensor calibration, and replacing the scrubber material are required to ensure reliability.