This is cool.
On a typical dive, the Poseidon Discovery lets divers stay underwater at least three times as long as scuba gear can, and since you don’t exhale into the water, you don’t create bubbles or noise that can scare off fish.
Instead of being limited by the amount of air you bring with you, a re-breather extends your time underwater by scrubbing what you exhale.
How about a 3 hour dive instead of a 1 hour dive.