Prism2 Rebreather Course
- Must be at least a minimum 18 years of age.
- Must be ISE BoE certified.
- Must have a minimum of 100 logged dives
- Must be able to swim 15 m on a breath hold.
- Must meet the general fitness level for the sport
The ISE Hollis Prism2 Rebreather Diver course is designed to:
- Educate individuals in basic rebreather technologies and
- Cultivate diver proficiency in the use of rebreather technology
This course assumes that divers are not experienced in the use of rebreather technology but are very capable open circuit divers.
•Minimum 6 days (BoE+ 7 days)
•Minimum 9 dives (BoE+ 10 dives)
•Minimum 500 minutes on the specific unit underwater (BoE+ 550 minutes)
- Student to instructor ratio will not exceed 3:1 in all in-water and surface sessions.
- Maximum training depth of 30 meters.
- No overhead environment. (i.e caves)
- Certification expires after 3 years. Students have to re-qualify. (An evaluation dive)
- Purpose • Risk • Benefit • Advantages • Disadvantages
- Common components of the rebreather and how they function • Mouthpiece & hoses • Counter lung • CO2 canister & chemical removal by the scrubber • Gas-addition system • Gas-management & information system
- Inherent risks of rebreathers • Hypoxia • Hyperoxia • Hypercapnia • Hyperventilation
- Introduction to the rebreather • Rebreather design • Gas circulation during inhalation • Gas circulation during exhalation • Gas changes • Passive gas addition • Diving logistics
- Rebreather alarms and warnings • Intrusion • Failure susceptibility • Information content • Verification • Physiological monitoring
- The physics behind a rebreather • O2 toxicity • Decompression • Theory & review • Rebreather vs. open circuit • Oxygen consumption (RMV) Configuration • Rebreather configuration
- Rebreather physical design • Components, functions, failures, problem recognition & alarms, problem solving • Mouthpiece, double hoses, check valves & bailout regulators • CO2 canister and scrubber bed Inner bellows & overpressure dump valve • Counter lung actuated gas addition regulators
- Problem recognition & management • Scrubber flooded leading to Hypercapnia • CO2 absorbent failures leading to Hypercapnia • Check-valve failure leading to Hypercapnia • Addition failures leading Hypoxia Mechanical failure leading to Hyperoxia • Gas-supply failures • Diving conditions leading to Hypoxia • Bailout scenarios • Physiological monitoring
- The Importance of instinctive physiological monitoring • Pre-dive planning & preparation • Gas duration • Gas choice • CO2 absorbent management • Pre-dive checks
- Pre-dive planning • Gas choice • Gas duration • Gas management scenarios • Decompression procedures • CO2 absorbent management & duration • Pre-dive checks/vacuum test • Open circuit bailouts
- Diving the Rebreather • Initial in-water verification • Descents/ascents on OC • Flow-checks • Buoyancy control • Breathing characteristics • Monitoring the unit & alarms • Flooding & failures • Monitoring the gas • Loop purging with mask • Gas switches
- Post-dive procedure • Rinse hoses between dives on same day • Rinse unit after 1 day's use • Disinfect and dry hoses and unit after 5 day's use Need for continuing education and skill reinforcement
- Flow checks
- Manifold failure
- Gas addition failures
- Gas sharing
- Rebreather malfunctions
- Hollis Prims2 Rebreather
- Oxygen & Diluet Tank (3 Liters each with inline valves)
- Bail out Stage (7 liter min) with regulator (1 meter) and spg
- All personal gear line suit (appropriate for conditions), mask, fins, etc.
- Surface marker buoy closed stlye
- spool with min of 30 meters of line
Tuition of min 950 € per student + instructor's travel and diving expenses. (to be shared equally amongst all students)