I am now a certified scuba diver. I took my 4 lake dives this weekend at Lake Tenkiller, and dove around two sunken boats, a bus, a plane, and a Coast Guard helicopter, with a total underwater time of 107 minutes. Afterward, we went out to the island and dove around a cool dropoff at my maximum allowed depth of 60ft as a certified open water diver for 47 minutes. Two days of diving and 154 total minutes. I'm already addicted and I can tell this is going to be expensive.