During the course, divers will be required to fit a 2 metre/7-foot primary regulator hose, and dive to a maximum depth of 40 metres/130 feet. They can use any optional combination of air, nitrox, trimix and/or oxygen (optional Trimix), and must complete a maximum of 10 minutes of decompression.

When completing a decompression dive, divers must use a bailout gas that is safe to breathe at the maximum operating depth of the decompression dive. If this gas is different from the primary breathing gas, divers must use a multi-gas switch computer and perform no-decompression dives. This ensures that divers are well-prepared for any potential emergencies they may encounter while diving.

Divers who complete the RAID Deco 40 Diver Course will certify to use up to 100% oxygen to extend their no decompression dive times by using multi-level gas switch dive procedures. The bottom or back gas maximum PO2 is 1.4, and a maximum of 1.6 (1.4 to 1.5 recommended) for extended no-stop diving. When divers are switching gases, they must use a multi-gas switch computer to ensure they are using the correct mixture.

Finally, divers who complete this course will certify to use air, nitrox, oxygen, and there is a trimix option with a maximum END/EAD of maximum 30 metres/100 foot. Overall, the RAID Deco 40 Diver Course is an excellent opportunity for experienced divers to gain 2 Columnnew skills and certifications while pushing their limits in a safe and controlled environment.