JJ CCR Mixed Gas

5 days                          6 dives                         $1500

This class certifies you to conduct decompression dives on a JJ CCR utilizing helium as a diluent gas with a minimum 16% oxygen to a maximum depth of 60m/200ft.

This course is designed for certified JJ CCR air/helitrox diluent decompression divers who want to increase their depth range.


Course prerequisites:

JJ CCR Air Diluent Decompression Procedures Rebreather or JJ CCR Helitrox Diluent Decompression Procedures Diver with 50 hours and a minimum of 50 dives on the unit, minimum age 18.

If the diver has 50 hours on another type of unit, only 25 hours are required to be on JJ CCR


What will I learn?

Over a minimum of 6 dives and several theory sessions you’ll cover

  • Gas physiology - includes O2 toxicity, hypoxia, N2 and He absorption, HPNS, CO2 toxicity
  • Dive Planning – use of tables, computers, gas requirements and limitations
  • Emergency procedures – flooded loop, cell issues, battery warnings/failures, bailout requirements
  • Helium considerations – advantages, HPNS, hypoxia, limitations
  • Dive checklists
  • Predive checks
  • In water skills – includes diluent flushes, bailout, buoyancy management and trim, deploy SMB, monitor/switching oxygen levels (set point), management of loop volume, bailing out at depth (including simulated decompression)
  • In water emergency procedures – includes loss of gas/gas shutdowns, flooded canister, flooded loop, broken hoses,CO2 breakthrough, high O2/low O2, electronics/battery failure, buddy breathing deco gas, ascent with an incapacitated CCR diver