Some parts of the world offer spectacular dives at depths greater than 39 meters / 130 feet, but there is no access (or very limited access) to helium. The TDI Extended Range course teaches you the proper techniques to efficiently use compressed air as a bottom gas to a maximum depth of 55 meters / 180 feet. Extended Range training provides knowledge of equipment requirements as well as the dangers of deep diving requiring nitrox or oxygen decompression stops.
Dives not to miss!
Objectives
- Spectacular dives deeper than 39 metres/130 feet
- No access to helium
- Learn the proper techniques for safely using compressed air as a breathing gas
- Staged decompression (with nitrox or oxygen)
- Maximum depth of 55 metres/180 feet
Course prerequisites
- Minimum age 18
- Advanced Nitrox and Decompression Procedures Diver, or equivalent
- Proof of a minimum of 100 logged dives, of which 25 must be deeper than 30 metres/100 feet
What you will learn during your extended range training
- History of deep air diving
- Physics
- Physiology
- Decompression Options (Air, Nitrox, Oxygen)
- Equipment considerations
- Dive planning
- Technical dive support
- Navigation
In water skills
- Use START before every dive
- Stress analysis and mitigation
- Gas matching procedures
- Demonstrate buoyancy control
- Good awareness, communications, proximity and team oriented dive practices
- Manage 2 stage cylinders,
- Gas switches
- Lift bag deployment
- Air-sharing ascent
- Contingency decompression schedule
- Remove and replace mask, deploy back up mask
- Tired diver tow
- Breath-hold swim
- Execute the planned dive
- Switching and isolating a malfunctioning regulator,
- Navigational techniques
- Ascent with ascent reel and lift bag and perform staged decompression