GUE’s Rebreather Diver course is designed to educate individuals in basic rebreather technologies and to cultivate diver proficiency in the use of GUE approved rebreather configurations.
Applicants for a Rebreather course must:
- Submit a completed registration form, a medical history, and a liability release to GUE Headquarters.
- Be physically and mentally fit.
- Hold insurance that will cover diving emergencies such as hyperbaric treatment, e.g. DAN Master-level insurance or equivalent.
- Be a nonsmoker.
- Obtain a physician’s prior written authorization for the use of prescription drugs, except for birth control, or for any prior medical condition that may pose a risk while diving.
- Be a minimum of 21 years of age.
- Be a GUE Tech 2 certified diver.
- Have a minimum of 25 Tech 2 level dives beyond Tech 2 certification.
The Rebreather course is normally conducted over five days; it requires at least eight dives and a minimum 40 hours of instruction, encompassing classroom, land drills and in-water work.
Rebreather Specific Training Standards
- Student-to-instructor ratio is not to exceed 6:1 during land drill or surface exercises; ratios cannot exceed 3:1 during any in-water training.
- Maximum depth of 100 feet/30 meters.
GUE training materials and recommended reading as determined by the course study packet received via online download after GUE course registration.
- Introduction: GUE organization and course overview (objectives, limits, expectations)
- Common components of the rebreathers and how they function
- Inherent risks of rebreathers
- Rebreather operation, alarms, and warnings
- Oxygen risks: hypoxia, hyperoxia
- Decompression consideration while using semi-closed rebreathers
- Oxygen loading, potential drop, adjusted deco
- Equipment configuration
- Problem recognition and management
- The importance of instinctive physiological monitoring
- Pre-dive planning
- Post-dive procedures
- Need for continuing education and skill reinforcement
Land Drills and Topics
- Flow checks
- Manifold failures
- Gas addition failures
- Gas sharing
Required Dive Skills and Drills
- Demonstrate a safe and responsible demeanor throughout all training.
- Demonstrate proficiency in underwater communication.
- Demonstrate basic proficiency managing a rebreather configuration.
- Demonstrate reasonable proficiency with use of the rebreather during ascents, descents, and diving.
- Demonstrate good buoyancy and trim, i.e. approximate reference is a maximum of 20 degrees off horizontal while remaining within 3 feet/1 meter of a target depth.
- Must be able to swim at least 500 yards/450 meters in less than 14 minutes without stopping. This test should be conducted in a swimsuit and, where necessary, appropriate thermal protection.
- Must be able to swim a distance of at least 60 feet/18 meters on a breath hold while submerged.
- Demonstrate ability to manage gas failures, including valve manipulation, gas sharing, and regulator switching as appropriate.
- Recognize, assess, and review diving limitations.
- Skillfully demonstrate gas failure procedures, including valve manipulation, gas sharing, and regulator switching, as appropriate.
- Demonstrate the ability to manage a flooded rebreather while discharging excess water.
- Demonstrate the ability to diagnose and correctly respond to simulated rebreather problems.
- Demonstrate effective valve management.
- Demonstrate proficiency in removing/attaching stage and/or decompression cylinders while hovering horizontally.
- Demonstrate the ability to comfortably switch gasses while maintaining good trim and neutral buoyancy.
- Demonstrate proficiency in safe diving procedures, including assembly, vacuum and pressure tests, pre-dive preparations, pre-dive vacuum test, flow check, in-water activity, and post-dive assessment and breakdown.
- Efficiently and comfortably demonstrate how to donate gas to an out-of-gas diver while using the rebreather.
- Be able to comfortably demonstrate use, manipulation, and failures of the gas addition system.
- Demonstrate awareness of a team members’ rebreather function and a concern for safety, responding quickly to visual indications and dive partner needs during diving and failures.
GUE base configuration as outlined in Appendix A, plus:
- Modified tank configuration as appropriate for GUE approved Rebreather
- Modified regulator configuration as appropriate for GUE approved Rebreather
- Bottom stage
- Two decompression bottles
Prior to the commencement of class, students should consult with a GUE representative to verify equipment requirements and appropriateness of any selected equipment.