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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 tothe PADI Training and Quality Management Department.
□ 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
Switch/Solo Issue No. ___________________________ (Not Valid in USA)
Expiration Date ______________________ (Valid from Date – UK Only) __________________
MAIL TO YOUR PADI OFFICEAttn: DSAT Tec Trimix Instructor CertificationSee current price list for mailing information. Please be sure to enclose all required materials (see checklist).
Rec’d ________________________ Ent ______________________
Standards and Theory/Practical Exams□ Verification of logged dives□ Verification of course assistance□ Enclosed processing fee (see current price list)
□ Applicant and Instructor signaturesOFFICE USE ONLY
Reviewer _______________________ Certification Date _________________
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Applicant Acknowledgement
I certify that the information contained here is true and correct to the best of my knowledge and understand that this certification is subject to approval by PADI.
Instructor Signatures: The verifying Instructors must be a DSAT Tec Trimix Instructor or a PADI Instructorwith 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 40metres/130 feet using trimix as the bottom gas, with at least 10 of these dives deeper than 50 metres/165 feet using trimixwith 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 Divercourse.* If applicant has a qualifying certification as a trimix instructor with another organization, having taught or assistedwith one of those courses meets this requirement. (Contact your PADI office for information about qualifying certificationsand 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 InstructorStandards 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.
Tec Trimix Instructor Guide Appendix
DSAT Tec Trimix Diver Course
Key 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 stand
Maximum Depth: 18 metres/60 feet
Bottom Gas: Air/enriched air
Note that the Assessment Dive is optional for certi-
fied Tec Deep Divers who have made a technical
decompression dive deeper than 40 metres/130 feet
in the previous six months. It is required for student
divers entering the Tec Trimix Diver course with a
qualifying prerequisite certification from another
training organization.
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Appendix Tec Trimix Instructor Guide
Training Dive OneRatios: 6 students to 1 instructor, with 2 more students permitted with a certified assistant 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 stand
Maximum Depth: 18 metres/60 feet
Bottom Gas: Air/enriched air
Training Dive TwoRatios: 2 students to 1 instructor, with 1 more student permitted with a certified assistant 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 feet
Maximum Depth: 50 metres/165 feet
Bottom Gas: Air/enriched air
Note that Training Dive Two is optional for students certified as DSAT Tec Deep Divers who
were 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 a
qualifying 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 feet
Maximum Depth: 50 metres/165 feet
Bottom Gas: Normoxic trimix
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Tec Trimix Instructor Guide Appendix
Training 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 feet
Maximum Depth: 55 metres/185 feet
Bottom Gas: Normoxic trimix
Note that Training Dive Four is optional for students certified as DSAT Tec Deep Divers. It
is 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 student permitted 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 of each training dive. 18 years or older.
Minimum Depth: 45 metres/150 feet
Maximum Depth: 67 metres/220 feet
Bottom Gas: TMx 16 to 21 percent oxygen
Training 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.
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Appendix Tec Trimix Instructor Guide
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 also haveexperience diving with trimix to the actual depth of each training dive. 18 years orolder.
Minimum Depth: 45 metres/150 feet
Maximum Depth: 67 metres/220 feet
Bottom Gas: TMx 16 to 21 percent oxygen, END 40 metres/130 feet or less
Training Dive SevenRatios: 2 students to 1 instructor, with 1 more student permitted with a certified assistant 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 feet
Maximum Depth: 75 metres/245 feet
Bottom Gas:TMx 16 to 21 percent oxygen,END 40 metres/130 feet or less
Training 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 feet
Maximum Depth: 75 metres/245 feet
Bottom Gas: TMx 16 to 21 percent oxygen, END 40 metres/130 feet or less
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Tec Trimix Instructor Guide Appendix
Knowledge Review –
Chapter ONEPlease complete this review, and remove it from the manual to hand in to your instructor. If
there’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 analyzers
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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.
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Tec Trimix Instructor Guide Appendix
12. 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 usingTMx21/35. 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 eachusing bottom mix, 21 metres for 1 minute, 18 metres for 2 minutes, 15 metresfor 4 minutes, 12 metres for 6 minutes and 9 metres for 8 minutes usingEANx50, and 6 metres for 5 minutes and 5 metres for 29 minutes using pureoxygen. Your ascent rate is 10 mpm. Your working SAC rate is 18 lpm andyour deco SAC rate is 16 lpm. Using the tables in the appendix of this and theTec Deep Diver Manual: How much volume of each gas do you need, includinga 1/3rd reserve? What is your oxygen exposure for the dive? Assuming you’rewearing high pressure double 12 litre cylinders filled to 270 bar, what is yourturn pressure using the Back Gas Turn Pressure formula?
14. IMPERIAL You’re planning a dive to 185 feet for 30 minutes usingTMx21/35. 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 bottommix, 70 feet for 1 minute, 60 feet for 2 minutes, 50 feet for 4 minutes, 40 feetfor 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 thetables 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 oxygenexposure for the dive? Assuming you’re wearing double 120 cf cylinders,working pressure 2400 psi filled to 2700 psi, what is your turn pressure usingthe Back Gas Turn Pressure formula?
Liability Release and Express Assumption of Risk for Technical Diving
Please read carefully, fill in all blanks and initial each paragraph before signing.
I, _________________________________________, HEREBY DECLARE THAT I AM A CERTIFIED (Participant)
SCUBA DIVER, TRAINED IN SAFE DIVING PRACTICES INCLUDING THE USE OF NITROX, AND AMAWARE OF THE INHERENT HAZARDS OF SCUBA DIVING.
_____ I further state that I am an experienced diver and have been certified by the followingtraining organization(s): ____________________________ and that I am aware of the requiredcertification or equivalent experience required to participate in technical diving activities. I havebeen a certified diver since __________, and have been diving for ________ years, with a total ofapproximately ________ dives, to a maximum depth of _________ metres/feet (circle one).
_____ I further declare that I have been advised and thoroughly informed of the inherent hazardsof participating in technical and recreational scuba diving activities, and in consideration of beingallowed to participate in this activity, I hereby assume all risks in connection with said activity, forany harm, injury or damage that I may suffer while I am participating in this activity, including allrisks connected therewith, whether foreseen or unforeseen.
_____ I further declare that I am properly trained, thoroughly informed, and completely under-stand the inherent hazards of Technical Scuba Diving activities, including the risk of serious injuryor death. Further, I understand that diving with compressed air, oxygen-enriched air (nitrox) trimix,and 100 percent oxygen involves certain inherent risks that include but are not limited to: decom-pression sickness, embolism, oxygen toxicity, inert gas narcosis, marine life injuries, fire and/orexplosion hazards, and barotrauma or hyperbaric injuries which can occur and require treatmentin a recompression chamber. I further understand that Technical Scuba Diving activities may beconducted at a site that is remote, either by time or distance or both, from such a recompressionchamber. I still choose to participate in such Technical Scuba Diving activities, despite the possi-ble absence of a recompression chamber in proximity to the dive site.
_____ I further declare that I understand Technical Diving involves risks which exceed thoseencountered in recreational scuba diving. These risks may include but are not limited to: depthswhich exceed the limits of recreational diving; decompression procedures; over-head environ-ments and/or the risk of entanglement which may prevent direct ascent to the surface in the eventof an emergency; sudden loss of visibility; necessity for computing both nitrogen and oxygenloading to plan dives; and the need for specialized training, equipment, and planning for differenttypes of Technical Scuba Diving. I understand that Technical Scuba Diving may involve a greaterrisk of serious injury or death than recreational scuba diving, and I assume the risk of this activity.
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_____ I understand that I AM SOLELY RESPONSIBLE FOR ENSURING MY OWN SAFETY DURINGPARTICIPATION IN THIS ACTIVITY and agree that: 1) the facility(ies), organization(s) or supervisorypersonnel offering this activity, ___________________, or their employees; 2) the organizers orpromoters of this event; 3) Diving Science and Technology Corp. (DSAT); and 4) International PADIInc. (PADI), its affiliate or subsidiary corporations, any of their respective employees, officers,agents or assigns (1 through 4 hereinafter referred to as "Released Parties"), may not be held liableor responsible in any way for any injury, death or other damages to me or my family, heirs, orassigns, that may occur as a result of my participation in this activity, or as a result of the negligenceof any party, including the Released Parties, whether passive or active.
_____ I declare that I am in good mental and physical fitness for diving, that I am not under theinfluence of alcohol, nor am I under the influence of any drugs that are contraindicated to diving. IfI am taking any medication, I declare that I have seen a physician and have approval to dive underthe conditions of this activity while under the influence of the medication/drugs.
_____ I understand that all types of scuba diving, including Technical Diving, are physically strenu-ous activities and that I will be exerting myself during this activity; and if I am injured as a result ofheart attack, panic, hyperventilation, etc. that I assume the risk of said injuries and that I will nothold the Released Parties responsible for the same.
_____ I will inspect all of my equipment prior to every use during this activity, ensuring that I haveall necessary equipment, and that it is functioning properly. I will not hold the Released Partiesresponsible for my failure to inspect my equipment prior to diving.
_____ I further save and hold harmless the Released Parties from any claim or lawsuit for personalinjury, property damage or wrongful death, by me, my family, estate, heirs, or assigns, arising out ofmy participation in this activity, including both claims arising during the activity or after I completethe activity.
_____ I further declare that I am of lawful age and legally competent to sign this liability release,or that I have acquired the written consent of my parent or guardian. I further agree that if any por-tion of this Agreement is held to be invalid for any reason that the remaining provisions shallremain in full force and effect.
I, ______________________________________, understand and agree that the terms hereinare contractual and not a mere recital, that this instrument is a legally binding document,and that I have signed this document of my own free act, after reading and understandingthe entire Liability Release and Express Assumption of Risk agreement.
__________________ _______________________________________________________(Date) (Signature of Participant)
__________________ _______________________________________________________(Date) (Signature of Parent or Guardian if applicable)
Tec Diver Statement of Understanding and Learning Agreement
This statement informs you of hazards, risks and your responsibilities for participating in the DSAT Tec Diver
course. Your signature acknowledges that you accept these risks and responsibilities.
I, ___________________________________________________, understand that as a DSAT Tec Diver I should:
1. Maintain good mental and physical health for diving.Refrain from being under the influence of alcohol ordrugs when tec diving. Stay proficient in divingskills, in particular, the skills required for certifica-tion as a DSAT Tec Diver.
2. Engage only in diving activities consistent with mytraining and experience.
3. Use complete, well-maintained, reliable equipmentfor which I have appropriate training.
4. Adhere to the team diving concept, but always beprepared to complete any dive without the assis-tance of a team mate. Although self sufficient, theresponsible tec diver dives as part of a team andadheres to team diving principles.
5. Maintain the proper attitude during training in whichI agree to:
• Follow the instructor’s directions and dive plansstrictly, and not to separate from the instructor ormy dive team.
• Refrain from tec diving outside this course until I amfully qualified and certified.
• Accept the risk for this type of diving, and for spe-cific risks unique to each dive environment, and toimmediately notify the instructor if this riskbecomes intolerable for me.
• Recognize the desirability of carrying diver accidentinsurance that covers tec diving (if available in mylocal area), and recognize that my instructor mayrequire me to have it.
6. Demonstrate self sufficiency – plan each dive asthough it will be necessary to make the dive andhandle all emergencies alone.
7. Demonstrate discipline and an attitude consistentwith responsible technical diving – I will not cut cor-ners, bend the rules, disregard dive plans, omit safe-ty equipment or exceed the limits of my training.
8. Obtain an orientation when diving in new environ-ments.
9. Know, obey and respect local diving laws and regula-tions including private land owner relations.
10. Accept the responsibility for my personal safety,while accepting and acknowledging the risks, anddemands tec diving imposes.
11. Stay informed on and dive according to the stateof the art in diving, tec diving, dive rescue, diveequipment and other influences on my safety as atec diver.
12. Accept that technical scuba diving has many gen-eral risks and hazards that either don’t exist inrecreational diving, or aren’t as severe, including:
• No direct access to the surface in an emergencydue to decompression requirements.
• Hypoxia/hyperoxia resulting from switching to thewrong gas, which can lead to drowning.
• Narcosis, which can lead to poor judgment/baddecisions that can cause an accident.
• DCS due to improper gas analysis, missed decostops, loss of deco gas and individual susceptibili-ty. DCS can cause permanent injury or death.
• Omitted procedures due to task loading, whichcan lead to accidents, DCS, air embolism, oxygentoxicity, or drowning.
• Drowning or air embolism due to BCD failure.• Extensive equipment requirements with redundant
configurations, which can lead to ergonomic com-plexity, increased risk of error and a physical bur-den.
13. I accept that a significant difference exists betweenrecreational scuba diving and technical scuba div-ing, and that in technical scuba diving, even if youdo everything right, there is still a higher inherentpotential for an accident leading to permanentinjury or death.
14. I accept that physical fitness affects my perform-ance and ability as a tec diver. Lack of the physicalfitness required can affect my safety by limiting myability to respond to an emergency, or by directlyleading to injuries. It is my responsibility to stay fitto dive, and to dive with the limits of my fitness.
I have read the above statements and have had any questions answered to my satisfaction. I understand the impor-tance and purpose of these practices and recognize they are for my own safety and well being.
I understand that failing to ahere to the above statements will put me at risk, and may be grounds for my dismissalfrom the Tec Deep Diver course. I acknowledge that the instructor is not permitted to and will not certify me if Idon’t meet all course performance requirements or if I demonstrate an attitude or behavior incompatible withresponsible technical diving practices.