Yesterday I had to dive in the Tennessee river under my boat to see if I had bent a shaft and prop from my expedition last week, they were bent. It was the first time I dove in low vis. Holy Cow! I could not see more than a foot in front of me. The only way I could see my dive partner is if we shinned our flashlights towards each other at less than two feet. It was scarey at first but as long as we took it slow it was alot of fun. We were down for 20 mins from 4ft to 8ft. Pretty cool dive, no vis, no pictures.