TDI Extended Range Diver
Benefits or Features
Learn how to conduct deeper dives using air and nitrox. Some of the places we visit does not always have helium blending capabilities so don't get left on shore!
Technical Description
There are some wonderful locations to dive that may not always have trimix blending available due to local regulations or cost or other reasons. This course provides training and experience required to competently utilize air for dives up to 55 metres /180 feet that requires staged decompression, utilizing nitrox mixtures or oxygen during decompression. The objective of this course is to train divers in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 55 metres / 180 feet utilizing nitrox mixtures or oxygen for staged decompression.
What will I be learning
1. History of Deep Air Diving
2. Physics
3. Physiology
4. Decompression Options
5. Equipment Considerations
6. Dive Tables
7. Dive Planning
8. Procedures and execution
Before I start
1. Minimum age 18
2. Certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalents
3. Provide proof of a minimum of 100 logged dives, of which 25 must be deeper than 30 metres / 100 feet
What do I need
The following equipment is required for each student:
1. Bottom mix cylinder(s)
2. Travel mix cylinder(s) if used
3. Decompression mix cylinder(s)
4. Regulator(s)
a. Primary and primary redundant regulators required on all bottom mix cylinders
b. Submersible pressure gauges are required on all primary / bottom mix cylinder(s)
c. A contingency use long hose second stage should be designated and appropriately rigged to facilitate air sharing at depth if necessary
5. Buoyancy compensator device(s) (BCD) adequate for equipment configuration
6. Redundant depth and timing devices
7. Air decompression computers allowed for use as depth and timing devices
8. Redundant light system if needed for site conditions
9. Jon-line and other rigging lines as dictated by site conditions
10. Ascent reel with lift bag/surface marker buoy
11. Exposure suit adequate for the open water environment
12. Two line cutting devices
13. Underwater slate (for decompression/contingency tables)
What will I be doing
1. Four dives with a minimum accumulated bottom time of 100 minutes
2. All dives must be deeper than 30 metres / 100 feet with 2 dives deeper than 40 metres / 130 feet
3. A maximum of 2 dives from advanced wreck course may be credited towards the total dives required, at the instructor’s discretion
4. TDI allows instructors to structure courses according to the number of students participating and their skill level
