Could you give me a idea of the price
I would like to give my Husband a Diving Gift (hes never done it )
Bit of a late reply re re-breathers.Huggie,
I'm not a diver but seriously looking into doing it in the near future. Yes there is a system you describe. Called a rebreather. Seen it used on TV documentaries where they do not want to disturb what ever it is they are trying to film. It doesn't produce any bubbles. Don't think you can dive for ever though, just a bit longer.
Hopefully someone with more knowledge can fill in any gaps.