The reason I asked was a bit self-serving. I have a friend who enjoys doing long solo dives, sometimes 4-6 hours in rivers in eastern NC. Most people would consider this to be 'black-water' diving, as the visibility is usually only 2-3ft max due to the tannin in the water. Having never done river diving, I believe I understand it that he and several friends might go and they're doing "same river" diving where they're all in the same area but the vis is so bad that it might as well be considered a solo dive (or he does an actual solo dive).
He says that they're his most relaxing kind of dive. Double 130s and a 18w 13.5ah HID and he's set for 6 hours. I believe his average depth is ~11ft. He mainly goes for the fossils--I find it fascinating when he returns from his dive and he shows me a few Meg teeth that he found, plus all sorts of other stuff. Other teeth, bones, vertebra--he has several display cases of the fossils he's found.
I'm hoping, once I get over this danged cold :shakehead :shakehead and get my doubles set up to go in a river with him and see how it's done. Thus I was curious--if I started doing those as solo dives, how many DIR people would dive with me knowing that I do these solo dives on the side. Note that they're not solo dives to 150ft or any kind of penetration...just easy relaxing river dives probably no deeper than 20ft. Other than those, I'm completely behind the team concept for diving.
