Going deep should never be a goal in and of itself, however there are some dive sites that do require going deep. In such cases it is critical to have proper training. The Deep Diver Specialty Course aims to teach the necessary skills to perform deep dives in a safe and enjoyable way. It includes a theory module and three open water dives (for people with an AOW certification) Emphasis is placed on gas management, including measurement and calculation of surface air consumption (SAC) rates, effects of narcosis, color and volume changes, understanding the theory behind oxygen toxicity and decompression algorithms, emergency decompression procedures, and proper buddy techniques. Participants who successfully complete the course are qualified to perform non-decompression dives to a maximum depth of 40 meters. Being a Deep Diver is also a prerequisite for any technical diving courses.