The SSI Extended Range Trimix training program is the foundation on which all other open circuit programs are built. This program marks the start of an exciting journey towards becoming a fully-fledged technical diver. Whether in sidemount or twin-bottle configuration, this program prepares you to plan and execute trimix decompression dives to a maximum depth of 45 m. You'll learn the techniques and procedures for using trimix and nitrox breathing mixes (up to 100% oxygen) for decompression. At the end of the program, you'll be certified as an SSI Extended Range Trimix diver, and your knowledge of technical diving will be further enhanced.