where to begin? Got more mistakes than technique :-)
You MUST be able to dive safely, with good buoyancy control and
confidence. For your own benefit, and that of other divers. Be aware of
your air consumption. Repeat: - Be aware of your air consumption.
You have to be completely familiar with your equipment. 25 meters
down in a strong current is not the time to find out that you can't
quite remember how to adjust your particular shooting mode!
I FIRMLY believe you have to be willing (and able) to ditch your
camera gear if needed. That's right - several thousand dollars worth.
You don't get bragging rights for that great shot if you die taking it!
If you must clip your gear onto your BCD make sure you (and your buddy)
can remove it in an emergency.
OK end of the sermon :-) the rest of the pages are more