My longest dive to date is 123 minutes. During my full cave course, we swam up Peacock Spring's Peanut tunnel to the end of the gold line (a little over 1900 ft), just past the restriction, then swam back, stopping here & there to do a few drills on the way back. Dove double 108's. None of us in the class hit 3rd's on the way in until we reached the turn around point.