The TDI Advance Nitrox Course qualifies divers to use enriched air nitrox from EAN 21 through EAN 100 within you current certification level to a maximum depth of 40 meters/130feet during dives that do not require staged decompression. Often taught in conjunction with the TDI decompression Procedure course, this can be considered the foundation of … Continue reading TDI Advance Nitrox Course