In reply to pebbles:
> (In reply to zakmacro) cave diving is very high risk, ............. From the diving angle I would have thought you would want to build up a LOT of scuba experience (perfect buoyancy control, diving in overhead environments, low visibility navigation among others) before considering getting involved with cave diving. ..............
Seconded.
Any overhead environment (so unable to make a direct ascent to the surface if things go wrong) requires advanced training and equipment. Cave diving is possibly one of the highest risk types of diving and before anyone would consider taking you into a cave you would be expected to have considerable diving experience.
Remember unlike "dry" caving if you have a problem you only have a limted amount of time (your air supply) to get things sorted and get back to the surface. So getting stuck or lost could be catastrophic. Also unlike diving a reef any equipment malfunction has to be dealt with at the time and not by simply bolting back to the surface.
Have you done any dry caving? Think of all that fine mud/silt and how one careless fin kick will reduce visability to zero. Cave divers always use a line so they can retrace their route back, but unless kept taught will wrap it self round arms/legs/kit creating a potential deathtrap with the diver tangled in their own safety line.
Another factor to consider is that you have to follow the profile of the cave system, which almost inevitably means bad dive profiles so an increased risk of Decompression Illness. Also this means your dive depth and duration will be dictated by the cave, so it is likely that you will find yourself entering deco and having to complete mandatory stops to off gass excess nitrogen on ascent.