Extended Range

Certain areas of the world provide spectacular dives at depths deeper than 39m/130 feet but you will not have access (or very limited access) to helium. The TDI Extended Range course teaches you the proper techniques for utilizing compressed air as a breathing gas and with a maximum depth of 55m/180 feet you won’t have to miss those dives. The Extended Range course will cover topics and skills such asEquipment requirements and configurationDecompression optionsUse of surface marker buoys.Buddy rescue Narcosis checks and management

 



Open Water Execution 

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 

 Required Equipment 

The following equipment is required for each student: 

1. Bottom mix cylinder(s) 

a. Cylinder volume appropriate for planned dive and student gas consumption 

b. Dual outlet valve, double manifold or independent doubles 

c. Labeled in accordance with TDI Standards 

2. Travel mix cylinder(s) if used 

a. Cylinder volume appropriate for planned dive and student gas consumption 

b. Labeled in accordance with TDI Standards 

3. Decompression mix cylinder(s) 

a. Cylinder volume appropriate for planned dive and student gas consumption 

b. Labeled in accordance with TDI Standards 

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 

a. Adequate for maximum planned depth 

b. Minimum of 12 kg / 25 lb. 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)

Student Prerequisites

Minimum age of 18
Minimum of 100 logged dives, of which 25 must be deeper than 100 fsw / 30 msw

Certification as a TDI Advanced Nitrox and TDI Decompression Procedures Diver (or equivalent) are required. This course is run over four days and consists of one day of theory and equipment workshop if required plus three full day's boat diving with a total of six dives

© Aquatech Productions 2013