Rebreather

Rebreather ?

A Circuit-oxygen cylinder tank for scuba-diving !
Rebreather is a recycling-system equipment reusing exhaust-gas of diver.
Circuit respiration-system na krup ! ...Wonderful ! An Exhaust-CO2 is adsorbed by a carbon-dioxide-adsorbent. And divide this to a pure-oxygen again. Its oxygen-density is adjusted by a computer in the Rebreather.
This rebreather has two kinds.
One is CCR. CCR is a completely closed-circuit system.
This equipment don't emit diver's exhaust-gas to in the water. So, this equipment is quiet. and, you can approach to sea-creatures like fish, etc.
And, you can dive in the deep sea.
The longest diving-time in the world is about 36 hours.
Another one is SCR. SCR is a Semi-Closed circuit system.
This equipment emits diver's exhaust-gas to in the water different from CCR. But, you can't dive in a depth of more than 5m.
Its possible depth is less than 5m.