BWMG introduces Nemo Dive System,sub$500 product for diving that is not much bigger than a football that you can dive down to 10 feet all day with a pocket full of std lithium batteries.
This unit is so small it is mind boggling. And it takes std supermarket lithium flashlight batteries, the ones a little bigger than AA. So with a pocket full of batteries you can dive all day long as opposed to 5? tank refills at $50 with SCUBA. Just recharge and you are ready for the next day.
IMHO a game changer. So for surface supplied air, BWMG (Brownies stock) will have all bases covered. Nemo to 10 feet, Nomad to 35 feet, Sea Lion to 65+ feet.
At 10 feet the danger level from holding your breath (never do that) and surfacing has been shown in studies to be minimal. So this means the training required before use is proportionally less. Resorts would be comfortable with renting them without an instructor.
Its the tiny blue thing in CEOs hand in pic. It floats on the top as you dive without any tanks just an airline. That sub $500 includes the hose and regulator.