Tec Trimix Instructor Guide                                                                                               ...
Appendix         Tec Trimix Instructor Guide           A-2                        padi.com
TEC TRIMIX INSTRUCTOR APPLICATION                                                                                         ...
Instructor Signatures: The verifying Instructors must be a DSAT Tec Trimix Instructor or a PADI Instructor    with a quali...
Tec Trimix Instructor Guide                                                        AppendixDSAT Tec Trimix Diver CourseKey...
Appendix                                                               Tec Trimix Instructor GuideTraining Dive OneRatios:...
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Appendix                                                           Tec Trimix Instructor GuideThe individual must have mad...
Tec Trimix Instructor Guide                                                                   AppendixKnowledge Review –Ch...
Appendix                                                        Tec Trimix Instructor Guide      make it possible to blend...
Tec Trimix Instructor Guide                                                                    Appendix12.      List five ...
Appendix                                                                 Tec Trimix Instructor Guide      TMx21/35: 6345 l...
Tec Trimix Instructor Guide                                                                 Appendix15.    List four benef...
Appendix                                                         Tec Trimix Instructor Guide3.   What are the two primary ...
Tec Trimix Instructor Guide                                                          Appendix      A deep stop is a stop f...
Appendix                                                        Tec Trimix Instructor Guide14.   What are your options if ...
Tec Trimix Instructor Guide                                                                 AppendixKnowledge Review –Chap...
Appendix                                                              Tec Trimix Instructor Guide       Everything should ...
Tec Trimix Instructor Guide                                                          Appendix 3.   How do you extend your ...
Tec Trimix Diver Exam ANSWER SHEET                             TEC TRIMIX DIVER EXAM     □ VERSION A                      ...
Tec Trimix Diver Exam A ANSWER KEY                              TEC TRIMIX DIVER EXAM           VERSION A                 ...
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Appendix

  1. 1. Tec Trimix Instructor Guide AppendixAppendixTable of ContentsDeep Stop Calculation Table – METRIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-48Deep Stop Calculation Table – IMPERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-49DSAT Tec Trimi Diver Course Key Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-5Emergency Procedures Slate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-50Knowledge Reviews Chapter ONE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9 Chapter TWO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-13 Chapter THREE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16 Chapter FOUR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-18Tec Diving Liability Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-51Tec Diving Statement of Understanding and Learning Agreement . . . . . . . . . . .A-53Tec Trimix Diver Exam Answer Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-20Tec Trimix Diver Exam A Answer Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-21Tec Trimix Diver Exam B Answer Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-22Tec Trimix Instructor Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3Trimix Oxygen Management Table – METRIC . . . . . . . . . . . . . . . . . . . . . . . . . . .A-25Trimix Oxygen Management Table – IMPERIAL . . . . . . . . . . . . . . . . . . . . . . . . . .A-34Trimix Sac Conversion Factors – METRIC and IMPERIAL . . . . . . . . . . . . . . . . . . .A-43Trimix Equivalent Narcotic Depth Table – METRIC . . . . . . . . . . . . . . . . . . . . . . . .A-44Trimix Equivalent Narcotic Depth Table – IMPERIAL . . . . . . . . . . . . . . . . . . . . . .A-45Trimix Maximum Depths in Metres of Seawater . . . . . . . . . . . . . . . . . . . . . . . . . .A-46Trimix Maximum Depths in Feet of Seawater . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-47Trimix Fill Decal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-54padi.com A-1
  2. 2. Appendix Tec Trimix Instructor Guide A-2 padi.com
  3. 3. TEC TRIMIX INSTRUCTOR APPLICATION PLEASE PRINT OR TYPE □ Check here if this is a change of addressName_____________________________________________________________ PADI No. _____________________ First Initial LastMailing Address __________________________________________________________________________________City____________________________________________________ State/Province____________________________Country__________________________________________ Zip/Postal Code _________________________________Home Phone (______) ___________________________ Business Phone (______) ____________________________Fax (_____) _____________________________ Email Address ____________________________________________Sex: □ M □ F Birthdate _____________________ Occupation _____________________________________ Day/Month/Year Requirements: To apply for the DSAT Tec Trimix Instructor rating you must meet the following requirements. Refer to the DSAT Tec Trimix Diver Instructor Guide for specifics. Direct questions on qualifying certifications to the PADI Training and Quality Management Department. □ PADI Master Scuba Diver Trainer (or higher) Rating □ DSAT Tec Trimix Diver (or qualifying certification*) □ DSAT Tec Deep Instructor □ I am at least 21 years old. * If submitting qualifying certification from another training organization, please be sure to attach photocopies of the certification.PAYMENT METHODApplication Fee____________________________ Check No._________________________Check for PADI Americas only – Must be payable to PADI in US dollars, and drawn on a US bank. American Express Discover Card MasterCard VISA JCB Tape/Attach aSwitch/Solo Issue No. ___________________________ (Not Valid in USA) 4.5cm x 5.7cm 1.75” x 2.25”Expiration Date ______________________ (Valid from Date – UK Only) __________________ Head-and-Shoulders PhotoCard No. ________________ ________________ ________________ ________________ PRINT NAME ONCardholder Name ________________________________________________________________ Please Print BACK OF PHOTOAuthorized Signature _______________________________________________________ Coin machine photos OKCardholder Address _______________________________________________________ (If different from applicant.) Do not send old cards NO DARK GLASSES_______________________________________________________________________________________________________________________MAIL TO YOUR PADI OFFICEAttn: DSAT Tec Trimix Instructor Certification CHECKLISTSee current price list for mailing information. Please be sure to □ Application filled-in completelyenclose all required materials (see checklist). □ Requirements completed □ Successfully completed Tec TrimixRec’d ________________________ Ent ______________________ Standards and Theory/Practical Exams □ Verification of logged divesShp’d________________________ □ Verification of course assistance □ Enclosed processing fee (see current price list) OFFICE USE ONLY □ Applicant and Instructor signatures Reviewer _______________________ Certification Date _________________padi.com A-3
  4. 4. Instructor Signatures: The verifying Instructors must be a DSAT Tec Trimix Instructor or a PADI Instructor with a qualifying certification. Logged Dive Verification: I have verified that the applicant has logged at least 350 dives with at least 50 decompres- sion dives deeper than 40 metres/130 feet, not including those required for certification as a technical diver. Verifying Instructor _____________________________________ PADI No. _______________ Date ___________________ Signature Day/Month/Year Logged Trimix Diver Verification: I have verified that the applicant has logged at least 30 dives deeper than 40 metres/130 feet using trimix as the bottom gas, with at least 10 of these dives deeper than 50 metres/165 feet using trimix with less than 21 percent oxygen. Verifying Instructor _____________________________________ PADI No. _______________ Date ___________________ Signature Day/Month/Year Course Assistance Verification: I have verified that the applicant has assisted with at least one DSAT Tec Trimix Diver course.* If applicant has a qualifying certification as a trimix instructor with another organization, having taught or assisted with one of those courses meets this requirement. (Contact your PADI office for information about qualifying certifications and proper documentation.) Verifying Instructor _____________________________________ PADI No. _______________ Date ___________________ Signature Day/Month/Year Tec Trimix Instructor Exams: I have verified that the applicant has successfully completed the Tec Trimix Instructor Standards Exam and Tec Trimix Instructor Theory and Practical Application Exam. Verifying Instructor _____________________________________ PADI No. _______________ Date ___________________ Signature Day/Month/Year If Applicable: Dive Center/Resort Name ____________________________________ Store No. ___________ Phone (_____)___________ *When meeting this requirement by qualifying certification enclose a copy of your trimix instructor certification and contact your local PADI Office regarding any additional required documents.Applicant AcknowledgementI certify that the information contained here is true and correct to the best of my knowledge andunderstand that this certification is subject to approval by PADI.Applicant Signature_______________________________________________ Date___________________ Signature Day/Month/Year padi.com A-4
  5. 5. Tec Trimix Instructor Guide AppendixDSAT Tec Trimix Diver CourseKey StandardsMinimum Instructor Rating, All Dives:Renewed PADI Instructor with Tec Trimix Instructor rating.Assessment DiveRatios: 6 students to 1 instructor, with 2 more students permitted with a certifiedassistant to a maximum of 8.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSATTec Deep Diver or a qualifying same level certification from another trainingorganization. 18 years or older.Minimum Depth: Water in which it is too deep to standMaximum Depth: 18 metres/60 feetBottom Gas: Air/enriched airNote that the Assessment Dive is optional for certi-fied Tec Deep Divers who have made a technicaldecompression dive deeper than 40 metres/130 feetin the previous six months. It is required for studentdivers entering the Tec Trimix Diver course with aqualifying prerequisite certification from anothertraining organization.padi.com A-5
  6. 6. Appendix Tec Trimix Instructor GuideTraining Dive OneRatios: 6 students to 1 instructor, with 2 more students permitted with a certifiedassistant to a maximum of 8.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecDeep Diver or a qualifying same level certification from another training organiza-tion. 18 years or older.Minimum Depth: Water in which it is too deep to standMaximum Depth: 18 metres/60 feetBottom Gas: Air/enriched airTraining Dive TwoRatios: 2 students to 1 instructor, with 1 more student permitted with a certifiedassistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from another training organization. Theindividual must have made at least 20 technical decompression dives to 40metres/130 feet or deeper, beyond those required for certification. 18 years or older.Minimum Depth: 27 metres/90 feetMaximum Depth: 50 metres/165 feetBottom Gas: Air/enriched airNote that Training Dive Two is optional for students certified as DSAT Tec Deep Divers whowere certified in the previous six months or who have logged at least one technical decom-pression dive requiring a decompression cylinder to 40 metres/130 feet or deeper in the previ-ous six months. It is required for student divers entering the Tec Trimix Diver course with aqualifying prerequisite certification from another training organization.Training Dive ThreeRatios: 2 students to 1 instructor, with 1 more student permittedwith a certified assistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADIDivemaster or higher level PADI Member who is a certifiedPADI Enriched Air Diver and certified as a DSAT Tec TrimixDiver or a qualifying full trimix diver from another trainingorganization. The individual must have made at least 20 tech-nical decompression dives to 40 metres/130 feet or deeper,beyond those required for certification. 18 years or older.Minimum Depth: 30 metres/100 feetMaximum Depth: 50 metres/165 feetBottom Gas: Normoxic trimix A-6 padi.com
  7. 7. Tec Trimix Instructor Guide AppendixTraining Dive FourRatios: 2 students to 1 instructor, with 1 more student permitted with a certifiedassistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from another training organization.The individual must have made at least 250 dives, with at least 40 technical decom-pression dives deeper than 40 metres/130 feet of which at least 20 are trimix decom-pression dives, beyond those required for certification. The individual must alsohave experience diving with trimix to the actual depth of each training dive. 18years or older.Minimum Depth: 40 metres/130 feetMaximum Depth: 55 metres/185 feetBottom Gas: Normoxic trimixNote that Training Dive Four is optional for students certified as DSAT Tec Deep Divers. Itis required for student divers entering the Tec Trimix Diver course with a qualifying prereq-uisite certification from another training organization.Training Dive FiveRatios: 2 students to 1 instructor, with 1 more studentpermitted with a certified assistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADIDivemaster or higher level PADI Member who is a certi-fied PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from anoth-er training organization. The individual must have madeat least 250 dives, with at least 40 technical decompres-sion dives deeper than 40 metres/130 feet of which atleast 20 are trimix decompression dives, beyond thoserequired for certification. The individual must also haveexperience diving with trimix to the actual depth ofeach training dive. 18 years or older.Minimum Depth: 45 metres/150 feetMaximum Depth: 67 metres/220 feetBottom Gas: TMx 16 to 21 percent oxygenTraining Dive SixRatios: 2 students to 1 instructor, with 1 more student permitted with a certifiedassistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from another training organization.padi.com A-7
  8. 8. Appendix Tec Trimix Instructor GuideThe individual must have made at least 250 dives, with at least 40 technical decom-pression dives deeper than 40 metres/130 feet of which at least 20 are trimix decom-pression dives, beyond those required for certification. The individual must also haveexperience diving with trimix to the actual depth of each training dive. 18 years orolder.Minimum Depth: 45 metres/150 feetMaximum Depth: 67 metres/220 feetBottom Gas: TMx 16 to 21 percent oxygen, END 40 metres/130 feet or lessTraining Dive SevenRatios: 2 students to 1 instructor, with 1 more student permitted with a certifiedassistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from another training organization. Theindividual must have made at least 250 dives, with at least 40 technical decompres-sion dives deeper than 40 metres/130 feet of which at least 20 are trimix decompres-sion dives, beyond those required for certification. The individual must also haveexperience diving with trimix to theactual depth of each training dive.18 years or older.Minimum Depth: 52 metres/170 feetMaximum Depth: 75 metres/245 feetBottom Gas:TMx 16 to 21 percent oxygen,END 40 metres/130 feet or lessTraining Dive EightRatios: 2 students to 1 instructor, with 1more student permitted with a certifiedassistant to a maximum of 3.Minimum Certified Assistant Qualifications: Renewed PADI Divemaster or higher levelPADI Member who is a certified PADI Enriched Air Diver and certified as a DSAT TecTrimix Diver or a qualifying full trimix diver from another training organization. Theindividual must have made at least 250 dives, with at least 40 technical decompres-sion dives deeper than 40 metres/130 feet of which at least 20 are trimix decompres-sion dives, beyond those required for certification. The individual must also haveexperience diving with trimix to the actual depth of each training dive. 18 years orolder.Minimum Depth: 55 metres/180 feetMaximum Depth: 75 metres/245 feetBottom Gas: TMx 16 to 21 percent oxygen, END 40 metres/130 feet or less A-8 padi.com
  9. 9. Tec Trimix Instructor Guide AppendixKnowledge Review –Chapter ONEPlease complete this review, and remove it from the manual to hand in to your instructor. Ifthere’s something you don’t understand, review the related material. If you still don’t under-stand, be sure to have your instructor explain it to you. 1. Is a gas blend of 19 percent oxygen, 33 percent helium and 48 percent nitro- gen a trimix? If so, is it a normoxic trimix, and how would you write the abbreviation for it? Yes it is trimix. It is not normoxic trimix. You would abbreviate it TMx 19/33. 2. What are three benefits and three drawbacks of diving with trimix? Benefits 1. Reduced narcosis 2. Reduced oxygen exposure 3. Reduced breathing resistance Drawbacks 1. Expense 2. Longer Deco times 3. More complex logistics and planning 3. Below what depth is trimix the broad community standard for all diving? Below what depth for overhead environments or complex environments? To what depth is the typical range for new, beginning trimix divers, assuming experience at that depth during training? Below 50 metres/165 feet trimix is the broad community standard for all diving. Below 40 metres/130 feet for overhead or complex environments. To 75 metres/245 feet is the range for new, begin- ning trimix divers. 4. Trimix can be made several ways. Describe how trimix is made by partial pres- sure blending with enriched air. The blender adds premixed enriched air to a cylinder with helium to produce the desired trimix. 5. How do you analyze trimix? Is a helium analyzer mandatory? How might a helium analyzer offset the cost of investing in one? You analyze trimix like EANx, with an oxygen analyzer to within 1% of desired blend. Helium analyzer is not mandatory. Helium analyzerspadi.com A-9
  10. 10. Appendix Tec Trimix Instructor Guide make it possible to blend up partially filled trimix cylinders, which can offset helium costs over time. 6. What information should appear on all cylinders used in a trimix dive? Labels and marking identifying the gas, the analyzed blend, the diver’s name and the blend’s maximum depth. 7. Describe two ways you can carry four stage/deco cylinders on a trimix dive. You can carry all cylinders on the left, two stacked and two trailed. You can carry on the right and left, high oxygen cylinders right and low oxygen left. The cylinders may be worn stacked, or one worn each side and the other two trailed. 8. Explain the two problems with using trimix in a dry suit. How do you avoid these? Helium conducts heat rapidly so you will get cold. Isobaric counter- diffusion is possible when you’re breathing a heavy gas surrounded by a light gas (helium). You avoid both by using a separate inflation system, ideally with argon. 9. What is the general recommendation regarding how deep you take a cylin- der, and what is the issue with this recommendation in trimix diving? The recommendation is to never take a cylinder deeper than you can breathe it. In trimix diving, if you lose your deco cylinders, you won’t be able to deco adequately, so the priority is to not lose them by wearing them the entire dive if necessary.10. Describe the procedures for gas switches with the two ways you can carry four stage/deco cylinders on a trimix dive? You always use NO TOX procedures. For all left, you always breathe cylinder on top. At switch, trail. You can move cylinders up under one in use, or wear one and trail three. For right, left, you breathe top then bottom on left and then top then bottom on right. It’s common to trail top cylinder after finishing with it.11. How precise should a decompression stop be? Why is this important on a trimix dive? You want to stay within .6 metres/2 feet of stop depth or better. It’s important because helium’s rapid diffusion makes it less tolerant of deco stop errors. A-10 padi.com
  11. 11. Tec Trimix Instructor Guide Appendix12. List five reasons why the use of desktop decompression software is standard practice in trimix diving. 1. Theoretically there are 100s of possible mixes. 2. It simplifies gas use calculations. 3. You can customize deep stops or use Tmx for deco. 4. It easily generates contingency tables. 5. You need it even with a multigas dive computer since dive computers do not calculate gas consumption prior to the dive.13. Name the two basic categories of decompression models found in desktop deco software and list the basic attributes that distinguish them. Neo-Haldanean: assumes no bubbles. Tends to bring divers up as shallow as possible quickly. Lots of field data and testsing. Bubble models: assumes bubbles form and tries to prevent them. More stops beginning deeper,but often shorter over all deco. Relatively little field data and testing.14. METRIC You’re planning a dive to 57 metres for 30 minutes using TMx21/35. Using deco software and inserting deep stops, you plan to decom- press at 40 metres, 30 metres, 27 metres and 24 metres for 1 minute each using bottom mix, 21 metres for 1 minute, 18 metres for 2 minutes, 15 metres for 4 minutes, 12 metres for 6 minutes and 9 metres for 8 minutes using EANx50, and 6 metres for 5 minutes and 5 metres for 29 minutes using pure oxygen. Your ascent rate is 10 mpm. Your working SAC rate is 18 lpm and your deco SAC rate is 16 lpm. Using the tables in the appendix of this and the Tec Deep Diver Manual: How much volume of each gas do you need, including a 1/3rd reserve? What is your oxygen exposure for the dive? Assuming you’re wearing high pressure double 12 litre cylinders filled to 270 bar, what is your turn pressure using the Back Gas Turn Pressure formula? Dpth Tme SAC CnFct Vol. Gas PO2 OTU/mins OTUs CNS/min CNS% 57 30 18 6.7 3618 TMx21/35 1.41 1.64 49.2 .83 24.9 48.5a 2 18 6.0 216 TMx21/35 1.28 1.45 2.9 .55 1.1 40 1 16 5.2 83.2 TMx21/35 1.09 1.15 1.15 .42 .42 35a 1 18 4.6 82.8 TMx21/35 .97 .94 .94 .33 .33 30 1 16 4.0 64 TMx21/35 .84 .73 .73 .28 .28 27 1 16 3.7 59.2 TMx21/35 .78 .61 .61 .22 .22 24 1(+1) 16 3.4 108.8 TMx21/35 .71 .49 .98 .22 .44 21 1 16 3.1 49.6 EANx50 1.55 1.85 1.85 2.22 2.22 18 2 16 2.8 89.6 EANx50 1.4 1.63 3.26 .67 1.34 15 4 (+1) 16 2.5 200 EANx50 1.25 1.4 7 .55 2.75 12 6 16 2.2 211.2 EANx50 1.1 1.16 6.96 .42 2.52 9 8 16 1.9 243.2 EANx50 .95 .92 7.36 .33 2.64 6 5 (+1) 16 1.6 153.6 oxygen 1.6 1.92 11.52 2.22 13.32 5 29 16 1.5 696 oxygen 1.5 1.78 51.62 .83 24.07padi.com A-11
  12. 12. Appendix Tec Trimix Instructor Guide TMx21/35: 6345 litres required (4232 + 2116 reserve) EANx50 : 1190 litres required (793 + 397 reserve) Oxygen: 1274 litres required (849 + 425 reserve) OTUs: 146.08 (Note: Minor differences due to CNS: 76.55% rounding are acceptable.) Turn Pressure = 120 bar (119.25)14. IMPERIAL You’re planning a dive to 185 feet for 30 minutes using TMx21/35. Using deco software and inserting deep stops, you plan to decom- press at 130 feet, 100 feet, 90 feet and 80 feet for 1 minute each using bottom mix, 70 feet for 1 minute, 60 feet for 2 minutes, 50 feet for 4 minutes, 40 feet for 6 minutes and 30 feet for 8 minutes using EANx50, and 20 feet for 5 min- utes and 15 feet for 29 minutes using pure oxygen.Your ascent rate is 30 fpm. Your working SAC rate is .75 cfm and your deco SAC rate is .55 cfm. Using the tables in the appendix of this and the Tec Deep Diver Manual: How much vol- ume of each gas do you need, including a 1/3rd reserve? What is your oxygen exposure for the dive? Assuming you’re wearing double 120 cf cylinders, working pressure 2400 psi filled to 2700 psi, what is your turn pressure using the Back Gas Turn Pressure formula? Dpth Tme SAC CnFct Vol. Gas PO2 OTU/mins OTUs CNS/min CNS% 185 30 .75 6.8 153 TMx21/35 1.42 1.66 49.8 .83 24.9158(a) 2 .75 5.8 8.7 TMx21/35 1.23 1.37 2.74 .55 1.1 130 1 .55 4.9 2.7 TMx21/35 1.04 1.06 1.06 .42 .42115 (a) 1 .75 4.6 3.5 TMx21/35 .97 .96 .96 .33 .33 100 1 .55 4.0 2.2 TMx21/35 .85 .74 .74 .28 .28 90 1 .55 3.7 2.0 TMx21/35 .78 .62 .62 .22 .22 80 1(+1) .55 3.4 3.7 TMx21/35 .72 .5 1.0 .22 .44 70 1 .55 3.1 1.7 EANx50 1.56 1.87 1.87 2.22 2.22 60 2 .55 2.8 3.1 EANx50 1.41 1.64 3.28 .83 1.66 50 4 (+1) .55 2.5 6.9 EANx50 1.26 1.41 7.05 .55 2.75 40 6 .55 2.2 7.3 EANx50 1.11 1.17 7.02 .48 2.88 30 8 .55 1.9 8.4 EANx50 .95 .92 7.36 .33 2.64 20 5 (+1) .55 1.6 5.3 oxygen 1.61 1.93 11.58 2.22 13.32 15 29 .55 1.5 23.9 oxygen 1.45 1.71 49.59 .83 24.07 TMx21/35: 264 cf needed (176 + 88) EANx50: 41 cf needed (27 + 14) Oxygen: 44 cf needed (29 + 15) OTUs: 144.67 (Note: Minor differences due to CNS: 77.23% rounding are acceptable.) Turn Pressure = 1170 psi A-12 padi.com
  13. 13. Tec Trimix Instructor Guide Appendix15. List four benefits of team diving and how each relates to trimix diving. 1. Higher likelihood of mission success 2. Preparedness and resources for handling emergencies 3. Provides “backup brain” 4. Camaraderie from facing a challgenge16. Explain how trimix makes it even more important and beneficial for team members to use compatible gases. Compatible gases make it easier to handle emergencies, plus helps keep the team together. Makes “back up brain” better because everyone switches together and dives the same schedule.17. List what a Good Divers Main Objective Is To Live stands for, and one aspect of each step that relates to planning a trimix dive. [Answers may vary. See text for summary.]Knowledge Review –Chapter TWOPlease complete this review, and remove it from the manual to hand in to your instructor. Ifthere’s something you don’t understand, review the related material. If you still don’tunderstand, be sure to have your instructor explain it to you. 1. What is the primary advantage of using a fullface mask for trimix diving? What two primary considerations do you have in using a fullface mask for trimix diving? The primary advantage is that it reduces your risk of drowning if you have a CNS convulsion. The two primary considerations are gas switches and gas sharing while wearing the mask. 2. How do you plan dives with a multigas trimix computer? How do you back one up? You plan multigas trimix computer dives with desktop deco software. You back up the computer with either a second multigas trimix com- puter, or with generated tables, a depth gauge and timer.padi.com A-13
  14. 14. Appendix Tec Trimix Instructor Guide3. What are the two primary advantages and four disadvantages of helium as a dive gas? Advantages 1. Doesn’t cause narcosis 2. Less breathing effort due to lower density Disadvantages 1. Longer dives than comparable air/EANx dives 2. Less forgiving of decompression errors 3. Isobaric counterdiffusion is a theoretical concern 4. Generally inappropriate as a dry suit gas4. How can putting trimix in your dry suit cause decompression problems? Trimix in your dry suit can cause DCS by isobaric counterdiffusion of helium through your skin when you’re breathing a denser gas.5. What is an END? Using the appropriate tables in the appendix, what is the END for 73 metres/240 feet if you’re diving with TMx18/33? END is Equivalent Narcotic Depth. For a given depth and trimix, it is the depth you would expect the same narcosis with air. Using the END table, the END for 73 metres is 47 metres; for 240 feet it is 150 feet.6. What are four considerations in choosing a trimix? What would the “ideal” trimix be for 73 metres/240 feet be? 1. Narcosis 2. Oxygen exposure 3. Decompression issues 4. Logistics Using the tables, the ideal trimix for 73 metres is TMx 16/41. For 240 feet it is TMX 16/41.7. What is a hypoxic trimix? What is a travel gas? When do you need a travel gas? A hypoxic trimix is trimix with less than 21% oxygen. A travel gas is a gas you breathe to get to the minimum useable depth for a hypox- ic trimix . You need it with a trimxi with less than 16% oxygen, or less than 18% if at altitude or expecting exertion at the surface.8. What is a deep stop? What are three ways to determine deep stops using desktop deco software, and two ways using a multigas trimix computer? A-14 padi.com
  15. 15. Tec Trimix Instructor Guide Appendix A deep stop is a stop for 1 to 5 minutes between the bottom and the first stop predicted by a neo Haldanean model. Desktop deco software 1. Automatic generation by software 2. Use a bubble dynamics model 3. Calculate stops manually and enter as waypoints Multigas trimix computer 1. Calculate in your head during ascent 2. Use the Deep Stop Calculation Table slate 9. As a general rule, which gas should you use at your first deep stop? Why. As a general rule, you should use your back (bottom) gas at the first deep stop to give yourself an oxygen exposure reduction after the high PO2 at depth.10. What’s an air break? How often should you do them? An air break is a break to low oxygen gas to reduce the risk of CNS toxicity. You should do them at least every 20 to 25 minutes for five minutes, though every 10 to 12 minutes for 2 to 5 minutes has some theoretical advantages.11. What’s the theoretical benefit of having a small amount of helium in your deco gas? A small amount of helium in the deco gas may slow helium off gas slightly to reduce potential bubble formation.12. What’s the optimum way to ascend when trimix diving? Ascend slowly and gradually, with a momentary pause or stop at each 3 metres/10 feet until reaching your deco stops. Don’t skip deco stops even if your schedule lets you . If it does, stop for one minute at each 3 metres/10 foot interval. between the required stops.13. Where do you wear travel gas when using it? What’s the procedure for begin- ning a dive on travel gas? You normally wear travel gas on the left. It is on top if wearing more than one cylinder on that side. Travel gas breathing starts at the surface. Teammates confirm that all are breathing travel gas, then descend together. At the planned determined depth, the team NO TOX switches together to back gas. This may be done with the descent check or when staging deco cylinders.padi.com A-15
  16. 16. Appendix Tec Trimix Instructor Guide14. What are your options if you lose your decompression gases on a trimix dive? Your options are to get support divers to bring some down to you, if available. If your teammates have theirs, you may be able to decompress with theirs after they’re done. Otherwise decompress as long and as best you can with your back gas; however, you’re at high risk of DCS.15. How do you handle a failure with your multigas trimix computer if you’re using a backup depth gauge, timer and tables, and the failure occurs in the middle of your decompression? Find the schedule for your bottom depth and time and then the time for your present stop. Complete the time for that stop as shown on the table and follow the table’s schedule for the rest of the decom- pression.16. Why are support divers especially beneficial on a trimix dive? What are the characteristics of an effective support diver? The added complexity of a trimix dive makes support divers espe- cially beneficial. An effective support diver is qualified for the sup- port dive and depths, is a good communicator, is a good problem solver and has patience.17. What four responsibilities do you have in the dive community due to your role and position as a Tec Trimix Diver? 1. Be a role model 2. Show humility 3. Bring up less experienced divers 4. Stay current A-16 padi.com
  17. 17. Tec Trimix Instructor Guide AppendixKnowledge Review –Chapter THREEPlease complete this review, and remove it from the manual to hand in to your instructor. Ifthere’s something you don’t understand, review the related material. If you still don’tunderstand, be sure to have your instructor explain it to you. 1. You make a dive to 55 metres/180 feet for 20 minutes on TMx18/50. Not counting deep stops, your deco schedule is 21 metres/70 feet for 1 minute, 18 metres/60 feet for 2, 15 metres/50 feet for 2, 12 metres/40 feet for 4, and 9 metres/30 feet for 7 using TMx50/10. Your final stop is 6 metres/20 feet for 24 minutes on oxygen. At the 18 metre/60 foot stop, your dry suit valve sticks momentarily, causing you to rise to nearly 6 metres/20 feet as you disconnect it, regain control and redescend to 18 metres/60 feet in less than 2 minutes. What should you do? Complete the 18 metre/60 foot stop and all stops up to and includ- ing the 12 metre/40 foot stop as scheduled.. Extend the 9 metre/30 foot stop to 10.5 minutes and the 6 metre/20 foot stop to 36 min- utes. Stay at 6 metres/20 feet as long as reasonably possible past 36 minutes. 2. What should you do if you experience DCS symptoms underwater? Signal your teammates that you think you’re bent. If recompression is not immediately available, complete decompression. Extend 6 metre/20 foot stop (ideally on oxygen) while your teammates com- plete decompression, surface and prepare for transportation to medical care. Stay on oxygen after surfacing and let your team- mates deal with your gear, etc. Continue first aid for DCS until reaching medical care. 3. What should you do if you experience CNS oxygen toxicity symptoms during a trimix dive? Immediately switch to low oxygen gas. Ascend if possible. Stay off high oxygen gas until at least 15 minutes past the last symptoms. If possible without affecting unreasonably affecting decompression, stay on lower oxygen gas and limit oxygen exposure. Abort the dive if possible. 4. Describe the level of streamlining and technique skill expected of a Tec Trimix Diver.padi.com A-17
  18. 18. Appendix Tec Trimix Instructor Guide Everything should be tucked, stowed and tight with nothing dangling or protruding. Your buoyancy control should be precise, and you should swim without stirring up silt, staying off the bottom. 5. Why does shallow breathing lead to rapid breathing and high gas consump- tion? What are two ways that carbon dioxide buildup can affect you on a trim- ix dive? Shallow breathing is less efficient, so carbon dioxide builds up lead- ing to rapid breathing. This consumes gas fast because of the depth. High carbon dioxide can cause high gas consumption, and it can cause narcosis to increase. 6. What are four differences of diving with trimix versus diving without it with respect to mission planning? The four differences of diving with trimix than can affect a mission are decompression duration, depth, narcosis reduction and that trimix is easier to breathe. 7. What is the primary mission of any dive? The primary mission of any dive is for the team to return from the dive unhurt.Knowledge Review –Chapter FOURPlease complete this review, and remove it from the manual to hand in to your instructor. Ifthere’s something you don’t understand, review the related material. If you still don’tunderstand, be sure to have your instructor explain it to you. 1. What are the limits of trimix diving? Why? There are no limits because technical diving is still being explored. 2. What are the limits of your training in the Tec Trimix Diver course? To 75 metres/245 feet or the deepest depth reached in the course, whichever is less, in conditions comparable to those in which I trained. A-18 padi.com
  19. 19. Tec Trimix Instructor Guide Appendix 3. How do you extend your limits as a Tec Trimix Diver? Gradually, with dives progressively deeper. Master new conditions shallow before going deeper. Team up with more experienced divers. 4. What are your responsibilities as a Tec Trimix Diver with respect to the state of the art in trimix diving in particular, and technical diving in general? It’s my responsibility to stay informed about the state of the art in tec diving. It’s my responsibility to stop tec diving if the risk becomes intolerable or my physical condition makes the risk unacceptable. It’s my responsibility to keep my skills and knowledge fresh, and to brush up after inactivity before resuming. 5. What’s the most important personal quality you can have with respect to extending your limits? Patience. 6. What is “crush depth”? What makes it an issue for trimix diving? Crush depth is the depth at which equipment can fail due to the pressure. It’s an issue in trimix diving because some equipment was designed for recreational diving, which is much shallower. 7. What’s the safest course with respect to avoiding crush depth? Stay within the manufacturer’s rated depth for the equipment. 8. What risks do you face by exceeding equipment’s depth rating? Catastrophic failure, seal failure and cracks, and non catastrophic crush. 9. What other depth-related issues might you encounter as a trimix diver? Gauge and computer limits, BCD/dry suit inflation, wet suit com- pression, regulator performance, and the reliability of decompres- sion models.10. What should you look for with respect to equipment rated to deep depths? Check the manufacturer depth rating. Look for liquid filled mechani- cal gauges. Trimix dive computers generally are rated to trimix depths. Look for bulkheads in large items like light cansisters and DPVs.padi.com A-19
  20. 20. Tec Trimix Diver Exam ANSWER SHEET TEC TRIMIX DIVER EXAM □ VERSION A □ VERSION B A B C D A B C D A B C D 1. □ □ □ □ 20. □ □ □ □ 36. □ □ □ □ 2. □ □ □ □ 21. □ □ □ □ 37. □ □ □ □ 3. □ □ □ □ 22. □ □ □ □ 38. □ □ □ □ 4. □ □ □ □ 23. □ □ □ □ 39. □ □ □ □ 5. □ □ □ □ 24. □ □ □ □ 40. □ □ □ □ 6. □ □ □ □ 25. □ □ □ □ 41. □ □ □ □ 7. □ □ □ □ 26. □ □ □ □ 42. □ □ □ □ 8. □ □ □ □ 27. □ □ □ □ 43. □ □ □ □ 9. □ □ □ □ 28. □ □ □ □ 44. □ □ □ □ 10. □ □ □ □ 29. ____________________ 45. ____________________ 11. □ □ □ □ _________________________ _________________________ 12. □ □ □ □ 30. □ □ □ □ _________________________ 13. □ □ □ □ 31. ____________________ _________________________ 14. □ □ □ □ _________________________ _________________________ 15. □ □ □ □ 32. □ □ □ □ 46. □ □ □ □ 16. □ □ □ □ 33. □ □ □ □ 47. □ □ □ □ 17. □ □ □ □ 34. □ □ □ □ 48. □ □ □ □ 18. □ □ □ □ 35. ____________________ 49. □ □ □ □ 19. □ □ □ □ _________________________ 50. □ □ □ □Name ________________________________________________________________________________ (Please Print)Class No. _____________ Date________________________ Total Correct ____________________STUDEENT DIVER STATEMENT:I have reviewed the questions I answered incorrectly or incompletely, and I now understand what I missed._______________________________________________ Date_________________________________ Student SignatureProduct No. 10257 Version 1.0 (06/03) © International PADI, Inc. 2003 A-20
  21. 21. Tec Trimix Diver Exam A ANSWER KEY TEC TRIMIX DIVER EXAM VERSION A □ VERSION B A B C D A B C D A B C D 1. □ □ □ 20. □ □ □ 36. □ □ □ 2. □ □ □ 21. □ □ □ 37. □ □ □ 3. □ □ □ 22. □ □ □ 38. □ □ □ 4. □ □ □ 23. □ □ □ 39. □ □ □ 5. □ □ □ 24. □ □ □ 40. □ □ □ 6. □ □ □ 25. □ □ □ 41. □ □ □ 7. □ □ □ 26. □ □ □ 42. □ □ □ 8. □ □ □ 27. □ □ □ 43. □ □ □ 9. □ □ □ 28. □ □ □ 44. □ □ □ 10. □ □ □ 29. (Metric) 31 meters 45. EANx50: 2 @ 18m/60ft, 11. □ □ □ (Imperial) 103 feet 2 @ 15m/50ft, 4 @ 12. □ □ □ 30. □ □ □ 12m/40 ft, 9 @ 10m/30 ft 13. □ □ □ 31. (Metric) TMx20/29 Oxygen: 6 @ 6m/20ft, 14. □ □ □ (Imperial) TMx19/30 30 @ 5m/15ft 15. □ □ □ 32. □ □ □ 46. □ □ □ 16. □ □ □ 33. □ □ □ 47. □ □ □ 17. □ □ □ 34. □ □ □ 48. □ □ □ 18. □ □ □ 35. (Metric) 42 m and 36 m 49. □ □ □ 19. □ □ □ (Imperial) 140 ft and 120 ft 50. □ □ □Name ________________________________________________________________________________ (Please Print)Class No. _____________ Date________________________ Total Correct ____________________STUDENT DIVER STATEMENT:I have reviewed the questions I answered incorrectly or incompletely, and I now understand what I missed._______________________________________________ Date_________________________________ Student SignatureProduct No. 10260 Version 1.0 (06/03) © International PADI, Inc. 2003 A-21
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  23. 23. Tec Trimix Instructor Guide Tec Trimix Diver Exam B ANSWER KEY Appendix TEC TRIMIX DIVER EXAM □ VERSION A VERSION B A B C D A B C D A B C D 1. □ □ □ 20. □ □ □ 36. □ □ □ 2. □ □ □ 21. □ □ □ 37. □ □ □ 3. □ □ □ 22. □ □ □ 38. □ □ □ 4. □ □ □ 23. □ □ □ 39. □ □ □ 5. □ □ □ 24. □ □ □ 40. □ □ □ 6. □ □ □ 25. □ □ □ 41. □ □ □ 7. □ □ □ 26. □ □ □ 42. □ □ □ 8. □ □ □ 27. □ □ □ 43. □ □ □ 9. □ □ □ 28. □ □ □ 44. □ □ □ 10. □ □ □ 29. (Metric) 24 meters 45. Oxygen: 4.5 @ 6m/20ft, 11. □ □ □ (Imperial) 79 feet 25.5 @ 5m/15ft 12. □ □ □ 30. □ □ □ (rounding up to whole 13. □ □ □ 31. (Metric) TMx17/39 minute is acceptable) 14. □ □ □ (Imperial) TMx17/41 15. □ □ □ 32. □ □ □ 46. □ □ □ 16. □ □ □ 33. □ □ □ 47. □ □ □ 17. □ □ □ 34. □ □ □ 48. □ □ □ 18. □ □ □ 35. (Metric) 42 m and 39 m 49. □ □ □ 19. □ □ □ (Imperial) 140 ft and 130 ft 50. □ □ □Name ________________________________________________________________________________ (Please Print)Class No. _____________ Date________________________ Total Correct ____________________STUDENT DIVER STATEMENT:I have reviewed the questions I answered incorrectly or incompletely, and I now understand what I missed._______________________________________________ Date_________________________________ Student Signature padi.com A-23Product No. 10261 Version 1.0 (06/03) © International PADI, Inc. 2003 A-23
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  25. 25. Tec Trimix Instructor Guide Appendix TRIMIX OXYGEN MANAGEMENT TABLE – METRICOXYGEN CONTENT 10% OXYGEN CONTENT 11% OXYGEN CONTENT 12%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.13 –– 0.00% 3 0.14 –– 0.00% 3 0.156 –– 0.00% 5 0.15 –– 0.00% 5 0.17 –– 0.00% 5 0.18 –– 0.00% 6 0.16 –– 0.00% 6 0.18 –– 0.00% 6 0.19 –– 0.00% 9 0.19 –– 0.00% 9 0.21 –– 0.00% 9 0.23 –– 0.00% 12 0.22 –– 0.00% 12 0.24 –– 0.00% 12 0.26 –– 0.00% 15 0.25 –– 0.00% 15 0.28 –– 0.00% 15 0.30 –– 0.00% 18 0.28 –– 0.00% 18 0.31 –– 0.00% 18 0.34 –– 0.00% 21 0.31 –– 0.00% 21 0.34 –– 0.00% 21 0.37 –– 0.00% 24 0.34 –– 0.00% 24 0.37 –– 0.00% 24 0.41 –– 0.00% 27 0.37 –– 0.00% 27 0.41 –– 0.00% 27 0.44 –– 0.00% 30 0.40 –– 0.00% 30 0.44 –– 0.00% 30 0.48 –– 0.00% 33 0.43 –– 0.00% 33 0.47 –– 0.00% 33 0.52 0.06 0.14% 36 0.46 –– 0.00% 36 0.51 0.03 0.14% 36 0.55 0.15 0.14% 39 0.49 –– 0.00% 39 0.54 0.12 0.14% 39 0.59 0.24 0.14% 42 0.52 0.07 0.14% 42 0.57 0.20 0.14% 42 0.62 0.31 0.17% 45 0.55 0.15 0.14% 45 0.61 0.27 0.17% 45 0.66 0.39 0.17% 48 0.58 0.22 0.14% 48 0.64 0.34 0.17% 48 0.70 0.46 0.17% 51 0.61 0.28 0.17% 51 0.67 0.41 0.17% 51 0.73 0.53 0.22% 54 0.64 0.35 0.17% 54 0.70 0.48 0.17% 54 0.77 0.60 0.22% 57 0.67 0.41 0.17% 57 0.74 0.54 0.22% 57 0.80 0.66 0.22% 60 0.70 0.47 0.17% 60 0.77 0.60 0.22% 60 0.84 0.73 0.28% 63 0.73 0.52 0.22% 63 0.80 0.66 0.22% 63 0.88 0.79 0.28% 66 0.76 0.58 0.22% 66 0.84 0.72 0.28% 66 0.91 0.85 0.33% 69 0.79 0.64 0.22% 69 0.87 0.78 0.28% 69 0.95 0.91 0.33% 72 0.82 0.69 0.28% 72 0.90 0.83 0.28% 72 0.98 0.97 0.33% 75 0.85 0.74 0.28% 75 0.94 0.89 0.33% 75 1.02 1.03 0.42%padi.com A-25
  26. 26. Appendix Tec Trimix Instructor GuideOXYGEN CONTENT 13% OXYGEN CONTEN 14% OXYGEN CONTENT 15%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.169 –– 0.00% 3 0.182 –– 0.00% 3 0.195 –– 0.00% 5 0.20 –– 0.00% 5 0.21 –– 0.00% 5 0.23 –– 0.00% 6 0.21 –– 0.00% 6 0.22 –– 0.00% 6 0.24 –– 0.00% 9 0.25 –– 0.00% 9 0.27 –– 0.00% 9 0.29 –– 0.00% 12 0.29 –– 0.00% 12 0.31 –– 0.00% 12 0.33 –– 0.00% 15 0.33 –– 0.00% 15 0.35 –– 0.00% 15 0.38 –– 0.00% 18 0.36 –– 0.00% 18 0.39 –– 0.00% 18 0.42 –– 0.00% 21 0.40 –– 0.00% 21 0.43 –– 0.00% 21 0.47 –– 0.00% 24 0.44 –– 0.00% 24 0.48 –– 0.00% 24 0.51 0.04 0.14% 27 0.48 –– 0.00% 27 0.52 0.06 0.14% 27 0.56 0.16 0.14% 30 0.52 0.07 0.14% 30 0.56 0.17 0.14% 30 0.60 0.26 0.14% 33 0.56 0.17 0.14% 33 0.60 0.27 0.14% 33 0.65 0.36 0.17% 36 0.60 0.26 0.14% 36 0.64 0.36 0.17% 36 0.69 0.45 0.17% 39 0.64 0.34 0.17% 39 0.69 0.44 0.17% 39 0.74 0.53 0.22% 42 0.68 0.42 0.17% 42 0.73 0.52 0.22% 42 0.78 0.62 0.22% 45 0.72 0.50 0.22% 45 0.77 0.60 0.22% 45 0.83 0.70 0.28% 48 0.75 0.57 0.22% 48 0.81 0.68 0.28% 48 0.87 0.78 0.28% 51 0.79 0.64 0.22% 51 0.85 0.75 0.28% 51 0.92 0.86 0.33% 54 0.83 0.71 0.28% 54 0.90 0.82 0.28% 54 0.96 0.93 0.33% 57 0.87 0.78 0.28% 57 0.94 0.90 0.33% 57 1.01 1.01 0.42% 60 0.91 0.85 0.33% 60 0.98 0.97 0.33% 60 1.05 1.08 0.42% 63 0.95 0.91 0.33% 63 1.02 1.04 0.42% 63 1.10 1.16 0.42% 66 0.99 0.98 0.33% 66 1.06 1.11 0.42% 66 1.14 1.23 0.48% 69 1.03 1.04 0.42% 69 1.11 1.17 0.48% 69 1.19 1.30 0.48% 72 1.07 1.11 0.42% 72 1.15 1.24 0.48% 72 1.23 1.37 0.55% 75 1.11 1.17 0.48% 75 1.19 1.31 0.48% 75 1.28 1.44 0.55% A-26 padi.com
  27. 27. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 16% OXYGEN CONTENT 17% OXYGEN CONTENT 18%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.208 –– 0.00% 3 0.221 –– 0.00% 3 0.234 –– 0.00% 5 0.24 –– 0.00% 5 0.26 –– 0.00% 5 0.27 –– 0.00% 6 0.26 –– 0.00% 6 0.27 –– 0.00% 6 0.29 –– 0.00% 9 0.30 –– 0.00% 9 0.32 –– 0.00% 9 0.34 –– 0.00% 12 0.35 –– 0.00% 12 0.37 –– 0.00% 12 0.40 –– 0.00% 15 0.40 –– 0.00% 15 0.43 –– 0.00% 15 0.45 –– 0.00% 18 0.45 –– 0.00% 18 0.48 –– 0.00% 18 0.50 0.02 0.00% 21 0.50 –– 0.00% 21 0.53 0.09 0.14% 21 0.56 0.17 0.14% 24 0.54 0.13 0.14% 24 0.58 0.21 0.14% 24 0.61 0.29 0.17% 27 0.59 0.25 0.14% 27 0.63 0.32 0.17% 27 0.67 0.40 0.17% 30 0.64 0.35 0.17% 30 0.68 0.43 0.17% 30 0.72 0.51 0.22% 33 0.69 0.44 0.17% 33 0.73 0.53 0.22% 33 0.77 0.61 0.22% 36 0.74 0.54 0.22% 36 0.78 0.62 0.22% 36 0.83 0.70 0.28% 39 0.78 0.63 0.22% 39 0.83 0.71 0.28% 39 0.88 0.80 0.28% 42 0.83 0.71 0.28% 42 0.88 0.80 0.28% 42 0.94 0.89 0.33% 45 0.88 0.80 0.28% 45 0.94 0.89 0.33% 45 0.99 0.98 0.33% 48 0.93 0.88 0.33% 48 0.99 0.98 0.33% 48 1.04 1.07 0.42% 51 0.98 0.96 0.33% 51 1.04 1.06 0.42% 51 1.10 1.16 0.42% 54 1.02 1.04 0.42% 54 1.09 1.14 0.42% 54 1.15 1.25 0.48% 57 1.07 1.12 0.42% 57 1.14 1.23 0.48% 57 1.21 1.33 0.55% 60 1.12 1.20 0.48% 60 1.19 1.31 0.48% 60 1.26 1.42 0.55% 63 1.17 1.27 0.48% 63 1.24 1.39 0.55% 63 1.31 1.50 0.67% 66 1.22 1.35 0.55% 66 1.29 1.46 0.55% 66 1.37 1.58 0.67% 69 1.26 1.42 0.55% 69 1.34 1.54 0.67% 69 1.42 1.66 0.83% 72 1.31 1.50 0.67% 72 1.39 1.62 0.67% 72 1.48 1.74 0.83% 75 1.36 1.57 0.67% 75 1.45 1.70 0.83% 75 1.53 1.82 2.22%padi.com A-27
  28. 28. Appendix Tec Trimix Instructor GuideOXYGEN CONTENT 19% OXYGEN CONTENT 20% OXYGEN CONTENT 21%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.247 –– 0.00% 3 0.26 –– 0.00% 3 0.27 –– 0.00% 5 0.29 –– 0.00% 5 0.30 –– 0.00% 5 0.32 –– 0.00% 6 0.30 –– 0.00% 6 0.32 –– 0.00% 6 0.34 –– 0.00% 9 0.36 –– 0.00% 9 0.38 –– 0.00% 9 0.40 –– 0.00% 12 0.42 –– 0.00% 12 0.44 –– 0.00% 12 0.46 –– 0.00% 15 0.48 –– 0.00% 15 0.50 0.00 0.00% 15 0.53 0.08 0.14% 18 0.53 0.10 0.14% 18 0.56 0.17 0.14% 18 0.59 0.24 0.14% 21 0.59 0.24 0.14% 21 0.62 0.31 0.17% 21 0.65 0.37 0.17% 24 0.65 0.36 0.17% 24 0.68 0.43 0.17% 24 0.71 0.49 0.22% 27 0.70 0.47 0.17% 27 0.74 0.54 0.22% 27 0.78 0.61 0.22% 30 0.76 0.58 0.22% 30 0.80 0.65 0.22% 30 0.84 0.73 0.28% 33 0.82 0.69 0.28% 33 0.86 0.76 0.28% 33 0.90 0.84 0.28% 36 0.87 0.79 0.28% 36 0.92 0.87 0.33% 36 0.97 0.94 0.33% 39 0.93 0.88 0.33% 39 0.98 0.97 0.33% 39 1.03 1.05 0.42% 42 0.99 0.98 0.33% 42 1.04 1.07 0.42% 42 1.09 1.15 0.42% 45 1.05 1.07 0.42% 45 1.10 1.16 0.42% 45 1.16 1.25 0.48% 48 1.10 1.17 0.42% 48 1.16 1.26 0.48% 48 1.22 1.35 0.55% 51 1.16 1.26 0.48% 51 1.22 1.35 0.55% 51 1.28 1.45 0.55% 54 1.22 1.35 0.55% 54 1.28 1.45 0.55% 54 1.34 1.54 0.67% 57 1.27 1.44 0.55% 57 1.34 1.54 0.67% 57 1.41 1.64 0.83% 60 1.33 1.52 0.67% 60 1.40 1.63 0.83% 60 1.47 1.73 0.83% 63 1.39 1.61 0.67% 63 1.46 1.72 0.83% 63 1.53 1.83 2.22% 66 1.44 1.69 0.83% 66 1.52 1.81 2.22% 66 1.60 1.92 2.22% 69 1.50 1.78 0.83% 69 1.58 1.89 2.22% 72 1.56 1.86 2.22% A-28 padi.com
  29. 29. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 22% OXYGEN CONTENT 23% OXYGEN CONTENT 24%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.29 –– 0.00% 3 0.30 –– 0.00% 3 0.31 –– 0.00% 5 0.33 –– 0.00% 5 0.35 –– 0.00% 5 0.36 –– 0.00% 6 0.35 –– 0.00% 6 0.37 –– 0.00% 6 0.38 –– 0.00% 9 0.42 –– 0.00% 9 0.44 –– 0.00% 9 0.46 –– 0.00% 12 0.48 –– 0.00% 12 0.51 0.03 0.14% 12 0.53 0.09 0.14% 15 0.55 0.15 0.14% 15 0.58 0.21 0.14% 15 0.60 0.26 0.14% 18 0.62 0.30 0.17% 18 0.64 0.36 0.17% 18 0.67 0.41 0.17% 21 0.68 0.43 0.17% 21 0.71 0.49 0.22% 21 0.74 0.55 0.22% 24 0.75 0.56 0.22% 24 0.78 0.62 0.22% 24 0.82 0.68 0.28% 27 0.81 0.68 0.28% 27 0.85 0.75 0.28% 27 0.89 0.81 0.28% 30 0.88 0.80 0.28% 30 0.92 0.87 0.33% 30 0.96 0.93 0.33% 33 0.95 0.91 0.33% 33 0.99 0.98 0.33% 33 1.03 1.05 0.42% 36 1.01 1.02 0.42% 36 1.06 1.10 0.42% 36 1.10 1.17 0.42% 39 1.08 1.13 0.42% 39 1.13 1.21 0.48% 39 1.18 1.28 0.48% 42 1.14 1.23 0.48% 42 1.20 1.32 0.48% 42 1.25 1.40 0.55% 45 1.21 1.34 0.55% 45 1.27 1.42 0.55% 45 1.32 1.51 0.67% 48 1.28 1.44 0.55% 48 1.33 1.53 0.67% 48 1.39 1.62 0.67% 51 1.34 1.54 0.67% 51 1.40 1.63 0.67% 51 1.46 1.72 0.83% 54 1.41 1.64 0.83% 54 1.47 1.74 0.83% 54 1.54 1.83 2.22% 57 1.47 1.74 0.83% 57 1.54 1.84 2.22% 60 1.54 1.84 2.22%padi.com A-29
  30. 30. Appendix Tec Trimix Instructor GuideOXYGEN CONTENT 25% OXYGEN CONTENT 27% OXYGEN CONTENT 29%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.33 –– 0.00% 3 0.35 –– 0.00% 3 0.38 –– 0.00% 5 0.38 –– 0.00% 5 0.41 –– 0.00% 5 0.44 –– 0.00% 6 0.40 –– 0.00% 6 0.43 –– 0.00% 6 0.46 –– 0.00% 9 0.48 –– 0.00% 9 0.51 0.05 0.14% 9 0.55 0.15 0.14% 12 0.55 0.15 0.14% 12 0.59 0.25 0.14% 12 0.64 0.34 0.17% 15 0.63 0.32 0.17% 15 0.68 0.42 0.17% 15 0.73 0.52 0.22% 18 0.70 0.47 0.17% 18 0.76 0.57 0.22% 18 0.81 0.68 0.28% 21 0.78 0.61 0.22% 21 0.84 0.72 0.28% 21 0.90 0.83 0.28% 24 0.85 0.74 0.28% 24 0.92 0.86 0.33% 24 0.99 0.98 0.33% 27 0.93 0.87 0.33% 27 1.00 1.00 0.33% 27 1.07 1.12 0.42% 30 1.00 1.00 0.33% 30 1.08 1.13 0.42% 30 1.16 1.26 0.48% 33 1.08 1.12 0.42% 33 1.16 1.26 0.48% 33 1.25 1.40 0.55% 36 1.15 1.24 0.48% 36 1.24 1.39 0.55% 36 1.33 1.53 0.67% 39 1.23 1.36 0.55% 39 1.32 1.51 0.67% 39 1.42 1.66 0.83% 42 1.30 1.48 0.55% 42 1.40 1.63 0.67% 42 1.51 1.79 2.22% 45 1.38 1.59 0.67% 45 1.49 1.76 0.83% 45 1.60 1.92 2.22% 48 1.45 1.70 0.83% 48 1.57 1.87 2.22% 51 1.53 1.81 2.22%OXYGEN CONTENT 26% OXYGEN CONTENT 28% OXYGEN CONTENT 30%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.34 –– 0.00% 3 0.36 –– 0.00% 3 0.39 –– 0.00% 5 0.39 –– 0.00% 5 0.42 –– 0.00% 5 0.45 –– 0.00% 6 0.42 –– 0.00% 6 0.45 –– 0.00% 6 0.48 –– 0.00% 9 0.49 –– 0.00% 9 0.53 0.10 0.14% 9 0.57 0.20 0.14% 12 0.57 0.20 0.14% 12 0.62 0.30 0.17% 12 0.66 0.39 0.17% 15 0.65 0.37 0.17% 15 0.70 0.47 0.17% 15 0.75 0.56 0.22% 18 0.73 0.52 0.22% 18 0.78 0.63 0.22% 18 0.84 0.73 0.28% 21 0.81 0.67 0.28% 21 0.87 0.78 0.28% 21 0.93 0.88 0.33% 24 0.88 0.80 0.28% 24 0.95 0.92 0.33% 24 1.02 1.03 0.42% 27 0.96 0.94 0.33% 27 1.04 1.06 0.42% 27 1.11 1.18 0.48% 30 1.04 1.07 0.42% 30 1.12 1.20 0.48% 30 1.20 1.32 0.48% 33 1.12 1.19 0.48% 33 1.20 1.33 0.48% 33 1.29 1.46 0.55% 36 1.20 1.32 0.48% 36 1.29 1.46 0.55% 36 1.38 1.60 0.67% 39 1.27 1.44 0.55% 39 1.37 1.59 0.67% 39 1.47 1.73 0.83% 42 1.35 1.56 0.67% 42 1.46 1.71 0.83% 42 1.56 1.87 2.22% 45 1.43 1.67 0.83% 45 1.54 1.84 2.22% 48 1.51 1.79 2.22% 51 1.59 1.90 2.22% A-30 padi.com
  31. 31. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 31% OXYGEN CONTENT 33% OXYGEN CONTENT 35%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.40 –– 0.00% 3 0.43 –– 0.00% 3 0.46 –– 0.00% 5 0.47 –– 0.00% 5 0.50 –– 0.00% 5 0.53 0.08 0.14% 6 0.50 –– 0.00% 6 0.53 0.09 0.14% 6 0.56 0.17 0.14% 9 0.59 0.24 0.14% 9 0.63 0.32 0.17% 9 0.67 0.40 0.17% 12 0.68 0.43 0.17% 12 0.73 0.52 0.22% 12 0.77 0.60 0.22% 15 0.78 0.61 0.22% 15 0.83 0.70 0.28% 15 0.88 0.79 0.28% 18 0.87 0.78 0.28% 18 0.92 0.87 0.33% 18 0.98 0.97 0.33% 21 0.96 0.93 0.33% 21 1.02 1.04 0.42% 21 1.09 1.14 0.42% 24 1.05 1.09 0.42% 24 1.12 1.20 0.48% 24 1.19 1.31 0.48% 27 1.15 1.24 0.48% 27 1.22 1.36 0.55% 27 1.30 1.47 0.55% 30 1.24 1.38 0.55% 30 1.32 1.51 0.67% 30 1.40 1.63 0.67% 33 1.33 1.53 0.67% 33 1.42 1.66 0.83% 33 1.51 1.79 2.22% 36 1.43 1.67 0.83% 36 1.52 1.80 2.22% 39 1.52 1.81 2.22%OXYGEN CONTENT 32% OXYGEN CONTENT 34% OXYGEN CONTENT 36%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.42 –– 0.00% 3 0.44 –– 0.00% 3 0.47 –– 0.00% 5 0.48 –– 0.00% 5 0.51 0.04 0.14% 5 0.54 0.12 0.14% 6 0.51 0.05 0.14% 6 0.54 0.13 0.14% 6 0.58 0.21 0.14% 9 0.61 0.28 0.17% 9 0.65 0.36 0.17% 9 0.68 0.44 0.17% 12 0.70 0.48 0.17% 12 0.75 0.56 0.22% 12 0.79 0.64 0.22% 15 0.80 0.65 0.22% 15 0.85 0.74 0.28% 15 0.90 0.83 0.28% 18 0.90 0.82 0.28% 18 0.95 0.92 0.33% 18 1.01 1.01 0.42% 21 0.99 0.99 0.33% 21 1.05 1.09 0.42% 21 1.12 1.19 0.48% 24 1.09 1.14 0.42% 24 1.16 1.25 0.48% 24 1.22 1.36 0.55% 27 1.18 1.30 0.48% 27 1.26 1.41 0.55% 27 1.33 1.53 0.67% 30 1.28 1.45 0.55% 30 1.36 1.57 0.67% 30 1.44 1.69 0.83% 33 1.38 1.59 0.67% 33 1.46 1.72 0.83% 33 1.55 1.85 2.22% 36 1.47 1.74 0.83% 36 1.56 1.87 2.22% 39 1.57 1.88 2.22%padi.com A-31
  32. 32. Appendix Tec Trimix Instructor GuideOXYGEN CONTENT 37% OXYGEN CONTENT 39% OXYGEN CONTENT 42%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.48 –– 0.00% 3 0.51 0.03 0.14% 3 0.55 0.14 0.14% 5 0.56 0.16 0.14% 5 0.59 0.23 0.14% 5 0.63 0.33 0.17% 6 0.59 0.25 0.14% 6 0.62 0.31 0.17% 6 0.67 0.41 0.17% 9 0.70 0.47 0.17% 9 0.74 0.55 0.22% 9 0.80 0.65 0.22% 12 0.81 0.68 0.28% 12 0.86 0.76 0.28% 12 0.92 0.87 0.33% 15 0.93 0.87 0.33% 15 0.98 0.96 0.33% 15 1.05 1.08 0.42% 18 1.04 1.06 0.42% 18 1.09 1.15 0.42% 18 1.18 1.28 0.48% 21 1.15 1.24 0.48% 21 1.21 1.34 0.55% 21 1.30 1.48 0.55% 24 1.26 1.41 0.55% 24 1.33 1.52 0.67% 24 1.43 1.67 0.83% 27 1.37 1.58 0.67% 27 1.44 1.69 0.83% 27 1.55 1.86 2.22% 30 1.48 1.75 0.83% 30 1.56 1.87 2.22% 33 1.59 1.91 2.22% OXYGEN CONTENT 40% OXYGEN CONTENT 43%OXYGEN CONTENT 38% DEPTH 3 PO2 0.52 OTU/MIN CNS% 0.07 0.14% DEPTH 3 PO2 0.56 OTU/MIN CNS% 0.17 0.14%DEPTH PO2 OTU/MIN CNS% 5 0.65 0.36 0.17% 5 0.60 0.26 0.14% 3 0.49 –– 0.00% 6 0.69 0.44 0.17% 6 0.64 0.35 0.17% 5 0.57 0.20 0.14% 9 0.82 0.69 0.28% 9 0.76 0.58 0.22% 6 0.61 0.28 0.17% 12 0.95 0.91 0.33% 12 0.88 0.80 0.28% 9 0.72 0.51 0.22% 15 1.08 1.12 0.42% 15 1.00 1.00 0.33% 12 0.84 0.72 0.28% 18 1.20 1.33 0.48% 18 1.12 1.20 0.48% 15 0.95 0.92 0.33% 21 1.33 1.53 0.67% 21 1.24 1.38 0.55% 18 1.06 1.11 0.42% 24 1.46 1.72 0.83% 24 1.36 1.57 0.67% 21 1.18 1.29 0.48% 27 1.59 1.91 2.22% 27 1.48 1.75 0.83% 24 1.29 1.46 0.33% 30 1.60 1.92 2.22% 27 1.41 1.64 0.83% 30 1.52 1.81 2.22% OXYGEN CONTENT 41% OXYGEN CONTENT 44% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.53 0.10 0.14% 3 0.57 0.20 0.14% 5 0.62 0.30 0.17% 5 0.66 0.39 0.17% 6 0.66 0.38 0.17% 6 0.70 0.48 0.17% 9 0.78 0.62 0.22% 9 0.84 0.72 0.28% 12 0.90 0.83 0.28% 12 0.97 0.95 0.33% 15 1.03 1.04 0.42% 15 1.10 1.16 0.42% 18 1.15 1.24 0.48% 18 1.23 1.37 0.55% 21 1.27 1.43 0.55% 21 1.36 1.57 0.67% 24 1.39 1.62 0.67% 24 1.50 1.77 0.83% 27 1.52 1.80 2.22% A-32 padi.com
  33. 33. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 45% OXYGEN CONTENT 48% OXYGEN CONTENT 50%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.59 0.23 0.14% 3 0.62 0.31 0.17% 3 0.65 0.37 0.17% 5 0.68 0.42 0.17% 5 0.72 0.51 0.22% 5 0.75 0.56 0.22% 6 0.72 0.51 0.22% 6 0.77 0.60 0.22% 6 0.80 0.65 0.22% 9 0.86 0.75 0.28% 9 0.91 0.85 0.33% 9 0.95 0.92 0.33% 12 0.99 0.98 0.33% 12 1.06 1.09 0.42% 12 1.10 1.16 0.42% 15 1.13 1.20 0.48% 15 1.20 1.32 0.48% 15 1.25 1.40 0.55% 18 1.26 1.42 0.55% 18 1.34 1.54 0.67% 18 1.40 1.63 0.67% 21 1.40 1.62 0.67% 21 1.49 1.76 0.83% 21 1.55 1.85 2.22% 24 1.53 1.82 2.22%OXYGEN CONTENT 46% OXYGEN CONTENT 49%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 3 0.60 0.26 0.14% 3 0.64 0.34 0.17% 5 0.69 0.45 0.17% 5 0.74 0.53 0.22% 6 0.74 0.54 0.22% 6 0.78 0.63 0.22% 9 0.87 0.79 0.28% 9 0.93 0.88 0.33% 12 1.01 1.02 0.42% 12 1.08 1.13 0.42% 15 1.15 1.24 0.48% 15 1.23 1.36 0.55% 18 1.29 1.46 0.55% 18 1.37 1.59 0.67% 21 1.43 1.67 0.83% 21 1.52 1.81 2.22% 24 1.56 1.87 2.22%OXYGEN CONTENT 47%DEPTH PO2 OTU/MIN CNS% 3 0.61 0.29 0.17% 5 0.71 0.48 0.22% 6 0.75 0.57 0.22% 9 0.89 0.82 0.28% 12 1.03 1.06 0.42% 15 1.18 1.28 0.48% 18 1.32 1.50 0.67% 21 1.46 1.71 0.83% 24 1.60 1.92 2.22%padi.com A-33
  34. 34. Appendix Tec Trimix Instructor Guide TRIMIX OXYGEN MANAGEMENT TABLE – IMPERIALOXYGEN CONTENT 10% OXYGEN CONTENT 11% OXYGEN CONTENT 12%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 10 0.13 –– 0.00% 10 0.14 –– 0.00% 10 0.16 –– 0.00% 15 0.15 –– 0.00% 15 0.16 –– 0.00% 15 0.17 –– 0.00% 20 0.16 –– 0.00% 20 0.18 –– 0.00% 20 0.19 –– 0.00% 30 0.19 –– 0.00% 30 0.21 –– 0.00% 30 0.23 –– 0.00% 40 0.22 –– 0.00% 40 0.24 –– 0.00% 40 0.27 –– 0.00% 50 0.25 –– 0.00% 50 0.28 –– 0.00% 50 0.30 –– 0.00% 60 0.28 –– 0.00% 60 0.31 –– 0.00% 60 0.34 –– 0.00% 70 0.31 –– 0.00% 70 0.34 –– 0.00% 70 0.37 –– 0.00% 80 0.34 –– 0.00% 80 0.38 –– 0.00% 80 0.41 –– 0.00% 90 0.37 –– 0.00% 90 0.41 –– 0.00% 90 0.45 –– 0.00% 100 0.40 –– 0.00% 100 0.44 –– 0.00% 100 0.48 –– 0.00% 110 0.43 –– 0.00% 110 0.48 –– 0.00% 110 0.52 0.07 0.14% 120 0.46 –– 0.00% 120 0.51 0.04 0.14% 120 0.56 0.16 0.14% 130 0.49 –– 0.00% 130 0.54 0.13 0.14% 130 0.59 0.25 0.14% 140 0.52 0.08 0.14% 140 0.58 0.21 0.14% 140 0.63 0.33 0.17% 150 0.55 0.16 0.14% 150 0.61 0.28 0.17% 150 0.67 0.40 0.17% 160 0.58 0.23 0.14% 160 0.64 0.35 0.17% 160 0.70 0.47 0.17% 170 0.62 0.30 0.17% 170 0.68 0.42 0.17% 170 0.74 0.54 0.22% 180 0.65 0.36 0.17% 180 0.71 0.49 0.22% 180 0.77 0.61 0.22% 190 0.68 0.42 0.17% 190 0.74 0.55 0.22% 190 0.81 0.67 0.28% 200 0.71 0.48 0.22% 200 0.78 0.61 0.22% 200 0.85 0.74 0.28% 210 0.74 0.54 0.22% 210 0.81 0.67 0.28% 210 0.88 0.80 0.28% 220 0.77 0.59 0.22% 220 0.84 0.73 0.28% 220 0.92 0.87 0.33% 230 0.80 0.65 0.22% 230 0.88 0.79 0.28% 230 0.96 0.93 0.33% 240 0.83 0.70 0.28% 240 0.91 0.85 0.33% 240 0.99 0.99 0.33% 250 0.86 0.76 0.28% 250 0.94 0.90 0.33% 250 1.03 1.05 0.42% A-34 padi.com
  35. 35. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 13% OXYGEN CONTEN 14% OXYGEN CONTENT 15%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 10 0.17 –– 0.00% 10 0.18 –– 0.00% 10 0.20 –– 0.00% 15 0.19 –– 0.00% 15 0.20 –– 0.00% 15 0.22 –– 0.00% 20 0.21 –– 0.00% 20 0.22 –– 0.00% 20 0.24 –– 0.00% 30 0.25 –– 0.00% 30 0.27 –– 0.00% 30 0.29 –– 0.00% 40 0.29 –– 0.00% 40 0.31 –– 0.00% 40 0.33 –– 0.00% 50 0.33 –– 0.00% 50 0.35 –– 0.00% 50 0.38 –– 0.00% 60 0.37 –– 0.00% 60 0.39 –– 0.00% 60 0.42 –– 0.00% 70 0.41 –– 0.00% 70 0.44 –– 0.00% 70 0.47 –– 0.00% 80 0.45 –– 0.00% 80 0.48 –– 0.00% 80 0.51 0.05 0.14% 90 0.48 –– 0.00% 90 0.52 0.07 0.14% 90 0.56 0.17 0.14% 100 0.52 0.08 0.14% 100 0.56 0.18 0.14% 100 0.60 0.27 0.14% 110 0.56 0.18 0.14% 110 0.61 0.28 0.17% 110 0.65 0.37 0.17% 120 0.60 0.27 0.14% 120 0.65 0.37 0.17% 120 0.70 0.46 0.17% 130 0.64 0.35 0.17% 130 0.69 0.45 0.17% 130 0.74 0.55 0.22% 140 0.68 0.43 0.17% 140 0.73 0.53 0.22% 140 0.79 0.63 0.22% 150 0.72 0.51 0.22% 150 0.78 0.61 0.22% 150 0.83 0.71 0.28% 160 0.76 0.58 0.22% 160 0.82 0.69 0.28% 160 0.88 0.79 0.28% 170 0.80 0.65 0.22% 170 0.86 0.76 0.28% 170 0.92 0.87 0.33% 180 0.84 0.72 0.28% 180 0.90 0.84 0.28% 180 0.97 0.95 0.33% 190 0.88 0.79 0.28% 190 0.95 0.91 0.33% 190 1.01 1.02 0.42% 200 0.92 0.86 0.33% 200 0.99 0.98 0.33% 200 1.06 1.10 0.42% 210 0.96 0.93 0.33% 210 1.03 1.05 0.42% 210 1.10 1.17 0.42% 220 1.00 0.99 0.33% 220 1.07 1.12 0.42% 220 1.15 1.24 0.48% 230 1.04 1.06 0.42% 230 1.12 1.19 0.48% 230 1.20 1.32 0.48% 240 1.08 1.12 0.42% 240 1.16 1.26 0.48% 240 1.24 1.39 0.55% 250 1.11 1.19 0.48% 250 1.20 1.32 0.48% 250 1.29 1.46 0.55%padi.com A-35
  36. 36. Appendix Tec Trimix Instructor GuideOXYGEN CONTENT 16% OXYGEN CONTENT 17% OXYGEN CONTENT 18%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 10 0.21 –– 0.00% 10 0.22 –– 0.00% 10 0.23 –– 0.00% 15 0.23 –– 0.00% 15 0.25 –– 0.00% 15 0.26 –– 0.00% 20 0.26 –– 0.00% 20 0.27 –– 0.00% 20 0.29 –– 0.00% 30 0.31 –– 0.00% 30 0.32 –– 0.00% 30 0.34 –– 0.00% 40 0.35 –– 0.00% 40 0.38 –– 0.00% 40 0.40 –– 0.00% 50 0.40 –– 0.00% 50 0.43 –– 0.00% 50 0.45 –– 0.00% 60 0.45 –– 0.00% 60 0.48 –– 0.00% 60 0.51 0.03 0.14% 70 0.50 –– 0.00% 70 0.53 0.10 0.14% 70 0.56 0.18 0.14% 80 0.55 0.14 0.14% 80 0.58 0.22 0.14% 80 0.62 0.30 0.17% 90 0.60 0.25 0.14% 90 0.63 0.33 0.17% 90 0.67 0.41 0.17% 100 0.64 0.36 0.17% 100 0.69 0.44 0.17% 100 0.73 0.52 0.22% 110 0.69 0.45 0.17% 110 0.74 0.54 0.22% 110 0.78 0.62 0.22% 120 0.74 0.55 0.22% 120 0.79 0.63 0.22% 120 0.83 0.72 0.28% 130 0.79 0.64 0.22% 130 0.84 0.73 0.28% 130 0.89 0.81 0.28% 140 0.84 0.72 0.28% 140 0.89 0.82 0.28% 140 0.94 0.91 0.33% 150 0.89 0.81 0.28% 150 0.94 0.90 0.33% 150 1.00 1.00 0.33% 160 0.94 0.89 0.33% 160 0.99 0.99 0.33% 160 1.05 1.09 0.42% 170 0.98 0.97 0.33% 170 1.05 1.08 0.42% 170 1.11 1.18 0.48% 180 1.03 1.05 0.42% 180 1.10 1.16 0.42% 180 1.16 1.26 0.48% 190 1.08 1.13 0.42% 190 1.15 1.24 0.48% 190 1.22 1.35 0.55% 200 1.13 1.21 0.48% 200 1.20 1.32 0.48% 200 1.27 1.43 0.55% 210 1.18 1.29 0.48% 210 1.25 1.40 0.55% 210 1.33 1.52 0.67% 220 1.23 1.36 0.55% 220 1.30 1.48 0.55% 220 1.38 1.60 0.67% 230 1.28 1.44 0.55% 230 1.35 1.56 0.67% 230 1.43 1.68 0.83% 240 1.32 1.51 0.67% 240 1.41 1.64 0.83% 240 1.49 1.76 0.83% 250 1.37 1.59 0.67% 250 1.46 1.72 0.83% 250 1.54 1.84 2.22% A-36 padi.com
  37. 37. Tec Trimix Instructor Guide AppendixOXYGEN CONTENT 19% OXYGEN CONTENT 20% OXYGEN CONTENT 21%DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% DEPTH PO2 OTU/MIN CNS% 10 0.25 –– 0.00% 10 0.26 –– 0.00% 10 0.27 –– 0.00% 15 0.28 –– 0.00% 15 0.29 –– 0.00% 15 0.31 –– 0.00% 20 0.31 –– 0.00% 20 0.32 –– 0.00% 20 0.34 –– 0.00% 30 0.36 –– 0.00% 30 0.38 –– 0.00% 30 0.40 –– 0.00% 40 0.42 –– 0.00% 40 0.44 –– 0.00% 40 0.46 –– 0.00% 50 0.48 –– 0.00% 50 0.50 0.01 0.00% 50 0.53 0.09 0.14% 60 0.54 0.11 0.14% 60 0.56 0.18 0.14% 60 0.59 0.24 0.14% 70 0.59 0.25 0.14% 70 0.62 0.31 0.17% 70 0.66 0.38 0.17% 80 0.65 0.37 0.17% 80 0.68 0.44 0.17% 80 0.72 0.50 0.22% 90 0.71 0.48 0.22% 90 0.75 0.55 0.22% 90 0.78 0.62 0.22% 100 0.77 0.59 0.22% 100 0.81 0.67 0.28% 100 0.85 0.74 0.28% 110 0.82 0.70 0.28% 110 0.87 0.77 0.28% 110 0.91 0.85 0.33% 120 0.88 0.80 0.28% 120 0.93 0.88 0.33% 120 0.97 0.96 0.33% 130 0.94 0.90 0.33% 130 0.99 0.98 0.33% 130 1.04 1.06 0.42% 140 1.00 0.99 0.33% 140 1.05 1.08 0.42% 140 1.10 1.16 0.42% 150 1.05 1.09 0.42% 150 1.11 1.18 0.48% 150 1.16 1.27 0.48% 160 1.11 1.18 0.48% 160 1.17 1.27 0.48% 160 1.23 1.37 0.55% 170 1.17 1.27 0.48% 170 1.23 1.37 0.55% 170 1.29 1.46 0.55% 180 1.23 1.36 0.55% 180 1.29 1.46 0.55% 180 1.36 1.56 0.67% 190 1.28 1.45 0.55% 190 1.35 1.56 0.67% 190 1.42 1.66 0.83% 200 1.34 1.54 0.67% 200 1.41 1.65 0.83% 200 1.48 1.75 0.83% 210 1.40 1.63 0.67% 210 1.47 1.74 0.83% 210 1.55 1.85 2.22% 220 1.46 1.71 0.83% 220 1.53 1.83 2.22% 220 1.61 1.94 2.22% 230 1.51 1.80 2.22% 230 1.59 1.92 2.22% 240 1.57 1.88 2.22%padi.com A-37

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