Technical 3

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Introduction

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The Technical 3 course is the third step in a diver’s pursuit for completing the full range of "Technical Diver" and is designed to further extend the range the student achieved in Technical 2.  Students will continue to refine their skills with multiple decompression bottles and will use multiple bottom stages while becoming familiar with the failures associated with them.

This mastery level course reviews and refines skills learned in Technical 2.  The curriculum is designed to transform the 2 deco bottle technical diver into multiple stage and decompression bottle technical divers, using 3 or more deco/stage bottles.  This completes the tool box required for dives in the 200'/60m to 250'75m range.  The addition of a bottom stage greatly increases safety in terms of gas reserves, and also increases the flexibility for dive planning.  Course participants will gain experience working with a variety of different gas mixtures for use as bottom mix and bottom stage and decompression gases.

Upon successful completion of Technical 3, the student will receive qualifications which allow the use of hypoxic Helium mixes to 12/60 and Nitrox decompression mixes up to and including 100% Oxygen to a training depth of 250'/75m.  Students are certified to use a maximum of 3 decompression bottles and 1 stage bottle.

Course Information

This course is structured around a 4 days.  The course involves a minimum of 6 hours of classroom instruction and 6 dives:  4 practice dives, and 2 experience dives with trimix; all 6 dives conducted with multiple stage and deco bottles.  It is designed to provide a working knowledge of trimix, including an understanding of the history and practice of decompression, physics, physiology, table analysis, ratio deco (deco on the fly) and other operational considerations.  This course is a decompression course, so divers in this depth range must be aware of the potential for entering into decompression commitments and should be prepared.

Course Limits

  • Maximum depth 250'/75m
  • Standard gases: Nitrox 32, 25/25, 21/35, 18/45, and 15/55
  • Standard decompression gasses:  100% Oxygen, Nitrox 50%, and trimix 35/25
  • No overhead diving

Requirements

  • Minimum age of 21
  • Must have completed UTD Technical 2 or equivalent
  • Must have completed UTD Rescue & Emergency Procedures or equivalent
  • Must have at least 250 logged dives, with at least 100 dives on doubles, of which 25 must have utilized a stage or decompression bottle
  • Must have at least 25 dives deeper than 100/30m using trimix or helitrox
  • Must surface-tow a diver in full equipment, in the environment they will be diving, for 10 minutes
  • Must demonstrate a rescue of a diver simulating oxygen toxicity
  • Must complete UTD online registration process
  • Must be able to swim 400 yards / 365m in less than 14 minutes or swim 800 yards / 732m  in less than 18 minutes with mask & fins
  • Must be able to swim 50' / 15m on a breath hold or demonstrate an air share swim where the out-of-air diver swims at least 50'/15m to the donating diver
  • No smoking
  • Use of prescription drugs must be authorized by a physician prior to training

Equipment Requirements

Prior to the commencement of the course, students should consult with a UTD representative to verify equipment requirements.  All participants are responsible for providing all equipment or for making provisions to secure all necessary equipment before the start of the course.

In general, it is better for the student to learn while using their own equipment.  However, students should exercise caution before purchasing new equipment to avoid acquiring substandard or unnecessary equipment.  Please contact us prior to making any purchases.

Sidemount Equipment Requirements

  • Cylinders:  sidemount pluggable double cylinders with appropriate stage rigging and quick disconnects
  • Three 40 cuft / 80 cuft decompression bottles
  • One 80 cuft stage bottle
  • Low pressure distribution system such as a Z-Distribution Block or Z-Isolator Manifold
  • Regulator system: primary second stage with a donatable 5’ or 7’ hose stowed in a wrapped fashion around the diver’s neck, and a backup second stage bungeed around the diver’s neck in a necklace fashion
  • Buoyancy compensator/trim device: rear inflation-type/wing or trim device
  • Z-System harness or equivalent
  • Depth-measuring device
  • Time-keeping device
  • Compass
  • Mask
  • Non-split fins
  • Cutting device
  • One primary reel per team with a minimum of 200'/60m of line
  • Exposure suit appropriate for the duration of exposure
  • Spool with minimum 70’/21m line and a surface marker buoy
  • Primary light and backup light
  • One primary reel per team, with a minimum of 200'/60m of line
  • Optional:  wetnotes and writing utensil

Backmount Equipment Requirements

  • Cylinders:  double cylinders
  • Three 40 cuft / 80 cuft decompression bottles
  • One 80 cuft stage bottle
  • Regulator system: primary second stage with a donatable 5’ or 7’ hose stowed in a wrapped fashion around the diver’s neck, and a backup second stage bungeed around the diver’s neck in a necklace fashion
  • Buoyancy compensator/trim device:  rear inflation-type/wing or trim device
  • Backplate and harness system
  • Depth-measuring device
  • Time-keeping device
  • Compass
  • Mask
  • Non-split fins
  • A cutting device
  • One primary reel per team with a minimum of 200'/60m of line
  • Exposure suit appropriate for the duration of exposure
  • Spool with minimum 70’/21m line and a surface marker buoy
  • Primary light and backup light
  • One primary reel per team, with a minimum of 200'/60m of line
  • Optional:  wetnotes and writing utensil