5 days                          7 dives                         $1500

This class certifies you to dive JJ CCR to a maximum depth of 100m/330ft, using mixed gas diluent appropriate to the dive plan.

This course is the highest level of JJ CCR training that TDI offers, and teaches you how to use the full capabilities of your CCR. This intensive course, designed for Mixed Gas JJ CCR divers who want to extend their depth limitations, is conducted over seven dives and focuses on all the elements needed to plan and execute dives to these depths.

Course prerequisites:

JJ CCR Mixed Gas Diluent diver with a minimum of 100 hours as a certified CCR diver over a minimum of 100 dives; a minimum of 50 hours and 50 dives must be on JJ CCR.

50% of these dives must be deeper than 30m/100 ft. All dives must be deeper than 9 m/20 ft. Minimum age 18

What will I learn?

Over a minimum of 7 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), managing 3 bailout cylinders,
• 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, plug in and share off-board gas, ascent with reel/lift bag whilst performing staged decompression