Lone Star Scuba Dallas

Extended Range Diver

Class / Course / Certification

OVERVIEW

This TDI ( Technical Diving International ) course is to provide the training and experience necessary to understand the hazards of and utilize air or EANx for dives to 180 fsw (55 msw) that require stage decompression, utilizing nitrox mixtures and/or oxygen during decompression.

QUALIFICATIONS OF GRADUATES

Upon successful completion of this course, graduates are considered competent to plan and execute extended range dives that require stage decompression and utilize air and EANx and/or oxygen for stage decompression without direct supervision, provided the diving activities and the areas dived approximate those of training.

STUDENT PRE-REQUISITES

• 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 Diver and TDI Decompression Procedures Diver (or equivalents) are required.

REQUIRED COURSE MINIMUMS

• Classroom / Briefing Hours - 8 (estimated).
  
• Openwater Dives - 6 with a minimum accumulated bottom time of 100 minutes. All dives must be deeper than 100 fsw / 30 msw with four dives deeper than 130 fsw / 40 msw.

REQUIRED EQUIPMENT

The following equipment is the minimum required for each student:

• Bottom Mix Cylinder(s)
  1. Cylinder volume appropriate for planned dive and student gas consumption
  2. Dual outlet valve, double manifold or independent doubles
  3. Labeled in accordance with TDI Standards
  
• Travel Mix Cylinder(s) if used
  1. Cylinder volume appropriate for planned dive and student gas consumption
  2. Labeled in accordance with TDI Standards
  
• Decompression Mix Cylinder(s)
  1. Cylinder volume appropriate for planned dive and student gas consumption
  2. Labeled in accordance with TDI Standards
  
• Regulator(s)
  1. Primary and primary redundant required on all bottom mix cylinders
  2. Submersible pressure gauges are required on all primary / bottom mix cylinder(s)
  3. A contingency use long hose second stage should be designated and appropriately
  rigged to facilitate air sharing at depth if necessary
  
• Buoyancy Compensator(s) adequate for equipment configuration
  
• Redundant Depth and Timing Devices
  
• Redundant Light System if needed for site conditions
  
• Jon-line and other rigging lines as dictated by site conditions
  
• Ascent Reel with Lift Bag/Surface Marker Buoy
  1. Adequate for maximum planned depth
  2. Minimum of 25 lb. lift bag/surface marker buoy
  
• Exposure Suit adequate for the open water environment
  
• Line Cutting Device (2)
  
• Underwater Slate (for decompression/contingency tables)
  

		
REQUIRED SKILL PERFORMANCE AND GRADUATION REQUIREMENTS

In order to complete this course, students must: 

• Satisfactorily complete the Advanced Trimix Course written examination.
• Complete all open water requirements safely and efficiently.
  
• Demonstrate mature, sound judgment concerning dive planning and execution.