The Extended Range Nitrox SSI program provides an in-depth introduction to the concepts, techniques and procedures required to plan nitrox decompression diving. Designed as a stand-alone program or as a stepping stone to becoming an Extended Range SSI diver, this enriched air diving program provides fundamental skills that form the basis of all future technical programs. Using full XR Sidemount or Twinset equipment, this program prepares divers to plan and execute limited-decompression dives to a maximum depth of 40 meters / 130 feet. In addition, this nitrox specialty diving course will teach you the techniques and procedures for using breathing gases up to 100% oxygen for decompression.