The DCIEM Sport Diving Tables were developed at the Defence and Civil Institute of Environmental Medicine in Toronto, Canada. DCIEM is a world leader in the field of decompression research. The Sport Diving Tables are comprised of the following tables: (A) air decompression, (B) surface intervals, (C) repetative diving, and (D) depth corrections for altitude dives. In addition to repetitive diving procedures, guidelines are also provided for multi-level diving.