Diving deeper than 20 meters is only permissible for certified "Deep Divers" (to a maximum depth of 40 metres), or for certified "Technical Divers" who use a breathing mixture comprised of 3 or more gases (to a depth of 100 metres or more). The deeper you dive, the shorter the maximum dive time may be.
Multi-level diving, is a technique by which the dive time between a depth of 20 and 40 metres can be safely extended, because nitrogen absorbed at the start of the dive can be expelled later in the dive.
During the IAHD specialty course 'Multi-level Deep Diver" you learn how to easily and safely, carry out dives to a depth between 20 and 40 metres. In addition you learn how you can you will learn how to safely extend the time that you can spend at depth, without having to make decompression stops. Following successful completion of the course, you will become a certified "Multi-level Deep Diver" and will receive the IAHD Multi-level Deep Diver certification card.
The IAHD course "Multi-level Deep Diver" is comprised of the following modules:
In this part of the course you learn what effects increased depth has on the human body. The theory of the saturation and de-saturation of the body tissues will be covered in detail. Most importantly, you will learn how to safely extend the time that you can spend at depth, without having to make decompression stops.
In this part of the course during open water dives, you will, together with your instructor, practice the techniques covered in the theory section. At the end of the course you will be able to safely make deep dives and multi-Level dives.
• Certified IAHD 'Autonomous Diver' (Diver Level 2) or equivalent;
• Minimum 15 years of age;
• Competent Swimmer;
• Approved Medical Statement;
• Signed Statement of Understanding.