Extended RangeThe SSI Extended Range Course (Tec 45) provides divers with the training necessary to independently plan and conduct limited decompression dives to a maximum depth of 45 meters 145 feet, using decompression mixtures of up to 100% oxygen and specialized diving equipment and procedures, for a maximum accumulated decompression time of 25 minutes, with an equally qualified dive buddy. Alternatively, the course can be completed using Trimix. (Additional