IANTD Recreational Trimix

We offer training for trimix (adding Helium to the mix) for the recreational diver. Using trimix (Nitrogen, Oxygen & Helium) helps keep narcosis out of the dive plan to depths in the 80'/24m to 130'/40m range. To qualify for this 2 day class, you must be an Advanced Open Water and Nitrox diver.  You can also take the Nitrox, Deep Diver and/or the Advanced Nitrox class with this course.

What is Trimix and why should I use it?

Recreational Trimix Diver Standard and Course Description

A. Purpose

1. This Program is designed to provide Sport Divers with a breathing medium for extending their dives to Sport Diving depths by using ENDs (Equivalent Nitrogen Depths) in the 40 to 80 fsw (12 to 24 msw) depth ranges. The diver may elect o dive the "mix" on tables or computers.
2. The IANTD Recreational Trimix Diver qualification may be taught as a single program or combined with a variety
of theh IANTD Advanced or Specialty Diver Programs.
3. The Program covers the use of Recreational (Rec) diving mixes in the range of 28 to 40% oxygen with Helium content
to provide an END no greater than 80 fsw (24 msw).
4. The Program qualifies divers to do no stop required dives using Recreational Trimix Gas mixtures to a depth of 
100 fsw (30 msw) or deeper up to student's previous qualification level.

B. Prerequisites

1. Must be a qualified Advanced Open Water diver or equivalent and EANx (Nitrox) Diver or take the EANx Diver course
in conjunction with the Recreational Trimix Diver course.
2. Must provide proof of a minimum of 15 logged dives.
3. Must be a minimum of 15 years of age with a parent or guardian authorization, or a minimum of 18 years of age
without guardian approval.

C. Texts

1. IANTD Recreational Trimix Diver Student Manual & Workbook, or equivalent text(s) approved in writing by the Board
or Directors (written approval will be issued by IANTD, Inc./IANTD World Headquarters).

D. Program Content

1. Complete all lectures from the Instructor presentation slides.
2. Program covers all Recreational Trimix gas mixes from 28% to a maximum of 40% oxygen, and Helium concentrations 
yielding an END no greater than 80 fsw (24 msw) emphasizing the use of 28/25.
3. Two dives are required and must be on Recreational Trimix mixtures in this course.
4. It is recommended that this program be taught as a combined Deep Diver course or with the Advanced EANx (Nitrox) 
Diver course with a minimum of two dives being completed on Recreational Trimix gas mixtures.

E. Equipment Requirements

1. Equipment used during this Program must be appropriate for the environment an in good working order.

F. Program Limits

1. No dives may be conducted to depths greater of 130 fsw (39 msw) and no END greater than 80 fsw (24 msw).
2. Appropriate safety decompression stops must be preformed. {Safety stops will be at 30 fsw (9 msw) - 20 fsw (6 msw) 
and 15 fsw (4.5 msw) each stop will be a minimum of 1 minute}.
3. No dives having a mandatory decompression Stop exceeding 3 minutes may be made, unless the course is combined with
Advanced EANx or Advanced Recreational Trimix.
4. No dives may be made with a PO2 greater than 1.6.

G. Qualification Requirements

1. Upon completion of the lecture, passing the written exam and completion of the dives satisfactorily, the IANTD
Recreational Trimix Diver card will be issued.

H. Water Skills Development

1. Complete a confined water session.
2. Demonstrate ability to plan Recreational Trimix dives.
3. Configure dive equipment for the most streamlined and efficient method.
4. Demonstrate good buoyancy control.
5. Perform gas sharing drill on the alternate second stage, while having the out of gas diver swim 40 feet (12m) to
the donor without breathing.
6. Perform one gas sharing drill on ascent.
7. Demonstrate proficiency in management of equipment.
8. Demonstrate precision buoyancy control by:
a. Timed ascent averaging approximately 33 feet (10 meter) per minute ascent rate.
b. Hover at constant depth for 3 minutes.
9. Demonstrate proficiency in body posture underwater for a streamlined swimming posture and avoidance of silt.

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