IANTD CCR Trimix

A. Purpose
1. This Program is designed for those individuals already involved in deep diving activities, but is not intended to be used as an
enticement to divers who are content to remain in Sport or EANx diving limits.
2. Trimix affords a safer means for deep-water exploration for divers who dive deep or perform with a clear head at depth. The
IANTD Trimix Diver Program requires the diver to be self-sufficient/reliant.
3. The knowledge and skills taught in this program are more than adequate to qualify divers to perform Trimix Dives outside of
training up to 333 fsw (100 msw).
4. (RB) This Program is designed to train divers in the safer use and technology of Rebreathers for deep diving to depths in
excess of 200 fsw (60 msw).
B. Prerequisites
1. Must be qualified IANTD Technical Diver, Technical Cave Diver, Technical Wreck Diver, Normoxic Trimix Diver or equivalent.
2. Must provide proof of a minimum of 200 logged dives, of which at least 25 were to depths between 140 fsw (42 msw) and 200
fsw (60 msw) or sufficient experience doing technical dives to satisfy the instructor that the student has the ability and
knowledge to continue into this level of training.
3. Must be a minimum of 18 years of age.
4. (RB) Must be qualified as an IANTD Normoxic Rebreather Diver, or if entering the Program based on equivalent experience,
must be qualified as either (OC) Normoxic Trimix Diver or (OC) Trimix Diver or must be taking the Normoxic Rebreather Diver
and Trimix Diver course on an approved Rebreather for mixed gas diving, with all dives other than confined water made on
Trimix or Heliox. Note all Rebreather Trimix Divers must have completed the Normoxic Rebreather lectures and skills.
5. (RB) 50 hours of dive time is required on the specific Rebreather for which the diver is being trained.
C. Program Content
1. All lectures completed with IANTD Course-specific Slides pertaining to the theory in the IANTD Trimix Diver Student Kit.
2. Perform a confined water session(s) or in lieu of confined water the instructor may opt to do a skills development dive to a
depth no greater than 90 fsw (27 msw) provided required decompressions stops are not required and a total of 4 dives will be
conducted in this course with in which two (2) stage cylinders are used, to a depth between 130 fsw ( 39 msw) and 333 fsw
(100 msw). These dives may be on air, EANx, Trimix or Heliox provided the depths are acceptable for the gas used, and two
(2) gas switches are practiced during ascent. Divers may not do dives on air deeper than 130 fsw (39 msw). OC and
Rebreather Divers must complete a minimum of 330 minutes of dive time including the skill training in either confined water or
OW dive and the four (4) Trimix dives.
3. All depths must be worked up to incrementally with no increase greater than 40 fsw (12 msw) from one dive to the next. One
dive must be to at least 240 fsw (72 msw) or deeper.
4. All dives must include two (2) gas switches.
5. Divers entering the Program on equivalent experience must complete the above requirements plus make two (2) additional
training (for a total of six training dives) dives using two (2) stage cylinders. These two (2) additional dives may be on air, EANx
or Trimix at the instructor’s discretion.
6. If the course is a combined course (e.g., Normoxic Trimix and Trimix Diver or Rebreather Normoxic Trimix and Trimix Diver,
the Program must include a minimum of 420 minutes of dive time completed within at least 7 dives.
7. To complete the course within the minimum specified dives. The water-skills evaluation must average 80 points With two (2) or
more additional dives the student may graduate from the course with an overall average score of 60 points.
8. (RB) For those who are already OC Trimix Divers this Program must include a confined water session and a minimum of 150
minutes of in water training time, using Trimix or Heliox, completed within at least two (2) open-water or overhead-environment
dives Unless upon completion of the Rebreather Normoxic Trimix course the instructor had upgraded them to Rebreather
Trimix diver.
D. Text & Equipment Requirements
1. IANTD Trimix Diver Student Kit for OC, SCR or CCR. (includes the IANTD M-222 Exploration and Mixed Gas Diving
Encyclopedia, The Tao of Survival Underwater, IANTD Table C-3718 dive planning charts and for CCR also C-3401
and option of C-3104 or C-3105.
2. Fulfill all Equipment Requirements as specified in the general Technical Diver Programs overview.
3. (RB) Own or have unlimited access to a rebreather on which the student is being trained.
E. Program Limits
1. There may be no more than 4 students per Instructor on any dives, and no more than 3 students per Instructor on dives
conducted to depths greater than 240 fsw (72 msw). The ratio for deeper dives may be increased to 4 students with an
assisting IANTD Normoxic Instructor or who is also a qualified IANTD Trimix Diver or a Trimix Supervisor. (RB) Rebreather
classes must have Rebreather Supervisors qualified to the equivalent level of OC to supervise and add to instructor ratios. A
Rebreather Supervisor may supervise OC, but an OC Supervisor may not supervise Rebreather Divers.
2. All dives other than the skill development dive, if used rather than confined water, must be conducted to depths between130
fsw (39 msw) and 333 fsw (100 msw). Students may not make a depth increase increment greater than 40 fsw (12 msw) than
their previous deepest dive.
3. Equivalent Narcosis Depth (END) may not exceed 130 fsw (39 msw).
4. Surface oxygen must be available for use in the event of Decompression Illness (DCI).
5. All dives must be performed as a single dive team.
6. All appropriate safety or required decompression stops must be performed.
7. (OC and SCR) No dives made me made with a PO2 greater than 1.6 for decompression and 1.4 for bottom mix.
8. (CCR) Inspired oxygen partial pressure may not exceed 1.3 PO2 on a dive or 1.4 PO2 on decompression. At 20 fsw (6 msw) a
flush to 1.6 may be used to check cell performance.
9. (CCR) If using a CCR dives must be conducted using an on board diluent mixture containing not more than 1.1 PO2 .
10. Adequate decompression gases and stages must be carried to complete decompression.
11. All dives must be completed within the IANTD Oxygen CNS% Limits.
12. No dive made be made deeper than 333 fsw (100 msw).
13. (RB) Each team must carry stages or adequate bailout gas or bailout rebreathers to get 1 ½ divers to the surface.
F. Water Skills Development
1. (RB) Divers on CCR complete the IANTD “S” drill chart C-3401 prior to all water sessions. Others complete “S” drill procedures.
2. A confined water session must be completed before conducting any OW dives. In lieu of confined water the instructor may opt
to do a skills development dive to a depth no greater than 90 fsw (27 msw) provided required decompressions stops are not
required and the skills development dive does not count toward total number of required course dives.
3. (Open Circuit) Two divers approximately 60 feet (18 meters) apart, locate each other while simulating an out of air situation
(without breathing, and exhaling slowly) and begin gas sharing via long hose. After taking 3 breaths at rest, continue swimming
at a normal rate while sharing gas for at least 2 minutes.
4. Simulate gas failure with valve shutdowns for both primary and secondary regulators. The entire drill must be completed in less
than 1 minute. This drill should be completed at least once each dive, with a buddy acting as a safety diver, then switch roles.
Upon completion of skill, verify both primary tanks are turned back on.
5. While swimming, demonstrate efficient switch to stage cylinder regulators.
6. Following a means of reference (pool wall, guide line, ship railing, etc.) with eyes closed, remove stage cylinders and swim a
distance of at least 15 feet (4.6 meters). Reverse direction, return to stage cylinders and replace them on correct sides,
identifying each cylinder by feel.
7. (Open Circuit) Prior to dives, students must use IANTD Gas Management Charts C-3202 to match gas turn points.
8. Remove and replace stage cylinders both at rest and while swimming.
9. Deploy and use a lift bag or up line at least once in OW.
10. Remove and replace equipment during confined water training (doubles, or rebreather and stage[s]), first on the surface, then
on the bottom.
11. Simulate the rescue of a diver. Tow the diver on the surface for a distance of at least 40 feet (12 meters) while simulating
mouth-to-mouth resuscitation. Go through EMS procedures and remove equipment from victim in the water (equipment
removal must be accomplished in less than 1½ minutes, students in continuous webbing who cannot have their equipment
removed within the time limit must add a quick release to their harness). Repeat until proficient.
12. (RB) Perform Leak Test.
13. (RB) Perform Loss Of Gas Drill.
14. (RB) Simulate bailout procedures (SCR, OC and Buddy OC).
15. (RB) Demonstrate proficiency in all skills on the Rebreather diver and Normoxic Rebreather Diver skills tables.
16. (RB) Swim 60 feet (18 meters) without breathing, and exhaling slowly, and then perform bailout procedure.
17. (RB) Following a means of reference (pool wall, guide line, ship railing, etc.) with eyes closed, remove stage cylinders and
swim a distance of at least 15 feet (4.5 meters). Reverse direction, return to stage cylinders and replace them on correct sides,
identifying each cylinder by feel.
18. (RB) Simulate the rescue of a diver. Tow the diver on the surface for a distance of at least 40 feet (12 meters) while simulating
mouth-to-mouth resuscitation. Go through EMS procedures and remove equipment from victim in the water (equipment
removal must be accomplished in less than 1½ minutes, students in continuous webbing who cannot have their equipment
removed within the time limit must add a quick release to their harness). Repeat until proficient.
19. (RB) Ascend using bailout for at least 30 fsw (9 msw) from a depth of at least 200 fsw (60 msw). Record time lapsed and gas
used.
20. (RB) Perform SCR bailout for minimum of 10 minutes on at least one (1) dive.
21. (RB) Exchange of stage cylinders or long hose to a dive buddy who has used 50% of their bailout gas.
22. (RB) Demonstrate proficiency in all skills on the IANTD CCR diver skills tables C-3400 1&2 as well as all skills in the CCR
Normoxic Trimix Diver course.
23. (RB) React to simulation of oxygen by pass due to faulty manual addition valves or switching assemblies.

CENA: 4500 PLN