What about the folks that ONLY dive in balmy gin-clear waters and ONLY under a pristine blue sky? It's open water. But they don't deal with at least three of the conditions you mention. Should they log those dives?
Actually, I think that the OP has it right. He keeps a "Scientific" log book of his aquarium dives. I'm still jealous.
Steve.
Now I didn't say that the area has to have those conditions all the time. It just has to be an area that COULD have them.
I'm the OP.
