Extended Range Nitrox
DaivoonTec, Lanzarote
Lanzarote is great to start your Tec journey. We have great sheltered bays for skill development sessions and amazing shore dives getting you to depth quickly. Come and see for yourself!
Start your journey: Entry level tec courses
Push your no-decompression limits and take your diving deeper—safely.
Extended Range Nitrox is your gateway into the world of technical diving. This course teaches you how to plan and execute dives up to 40 meters using enriched air nitrox and technical-grade equipment with precision and control. You’ll refine your buoyancy, trim, and team diving skills while gaining confidence with twinsets or sidemount configurations.
Perfect for divers who want more time, more depth, and more capability—without jumping straight into full decompression diving.
Twinset
Twinsets are the traditional backbone of technical diving. With two back-mounted cylinders and a manifold system, they offer a symmetrical, solid setup that keeps your trim stable, offers unparalled balance and gas management straightforward.
Perfect for divers who prefer a single unit on their back and want seamless access to both tanks through the manifold. Also has less of a learning curve from traditional single tank recreational diving.
Sidemount
Sidemount offers a more flexible and modular approach—cylinders are mounted on your sides, reducing strain on your back and allowing easier access to valves and hoses.
It’s ideal for tight spaces, like caves or confined wrecks, but is becoming more popular in Open water aswell. However Sidemount requires prior knowledge and certification for the XR Nitrox course. If you don’t have a Sidemount certification an Extended Range Sidemount course is the perfect start!
Limits:
- Max Depth: 40 meters
- Decompression: Up to 15 minutes of accalerated decompression
- Deco gases used : Up to 100% O2. However mostly EANx 50
- Backgas: Typically Air, EANx 28 or EANx 32 depending on the profile
- Equipment: Twinset or sidemount with extended range configuration
- Stage Deco Diving: Decompression planning is practiced, and executed during training dives
- Goal: Skill development, planning, and configuration – entry to tec diving
What You’ll Do in the SSI Extended Range Nitrox Course
Academic Sessions
- Dive planning for extended range nitrox dives
- Gas management and oxygen exposure limits
- Decompression theory and use of nitrox mixtures
- Equipment configuration and safety protocols
Pool / Confined Water Training
- Equipment assembly and familiarization with extended range gear
- Stage tank removal and replacement (surface)
- S-Drills and light deployment (optional)
- Buoyancy, trim, and propulsion techniques using frog and flutter kicks
- Out-of-gas and unconscious diver scenarios
Open Water Training Dives (x4)
- Master neutral buoyancy and trim under realistic conditions
- Execute precise gas switches and manage deco gas
- Practice dive planning and run decompression plans
- Calculate bottom SAC (Surface Air Consumption) rate
- Perform DSMB deployment and diver rescue scenarios (surface & underwater)
- Full team-based dive execution using technical protocols
Final Evaluation
- Equipment care and maintenance
- Logbook debriefing
- A written final exam to confirm full understanding of course content