http://swissbaync5d7ykaz7dh7v4qjrb4gmen5aj3bogxrcgbb43ij34bjuyd.onion/pdf/Books/Survival/Medicine/oddsnends.htm
On February 14, 1990 Bret Gilliam dove 452 feet off the coast of Honduras (Roatan). He
descended in 4 minutes 41 seconds and stayed at depth one minute 40 seconds. Then on March
18, 1994 Daniel J. Manion, M.D. dove to 510 feet on Clifton's Wall, Nassau, The Bahamas.