Technical 1

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Introduction

The Technical 1 course is designed to prepare divers for the rigors of technical diving and to familiarize them with the use of different breathing gases (25/25, 21/35 or 18/45), use of a single decompression bottle with the option of two different decompression gas mixtures (either Nitrox 50 or 100% O2) and various approaches to conducting 2 technical dives in a day.

Technical 1 training focuses on critical skills including bottom and mid-water failures cultivating, integrating, and ultimately testing the divers with blue water skills and their ability to deal with failures not only on the bottom, but also during the accent and gas switch; skills which are essential for safe technical diving.  This critical training will include problem identification and resolution, and building the capacity for progressively more challenging diving.

Students will continue to use double cylinders in addition to the use of a decompression bottle of either 100% Oxygen or Nitrox 50% for accelerated and "on the fly" decompression.  This course takes advantage of the use of Helium to minimize narcosis, and the application and benefit of single decompression bottle diving will be thoroughly explored.

An optional mini class for use of a stage bottle is available to students who have completed the Technical 1 course or opt to take the Stage Mini concurrently with Technical 1.

The limits for a Technical 1 diver are 160’/48m, 1 decompression bottle and the use of 1 stage bottle (if trained).  Maximum decompression time when using 100% Oxygen for decompression is limited to one Oxygen cycle (15 minutes) and decompression time is limited to 30 minutes if using Nitrox 50% for decompression.

Course Information

The Technical 1 course is normally conducted over a 4 day period, and cumulatively involves a minimum of 32 hours of instruction, designed to provide a working knowledge of enriched air diving, use of Helitrox and decompression mixtures, including history, physics, physiology, tables, and operational considerations.

Course requirements include eight hours of academics and 8 dives, 2 of which are student development dives, 4 of which will be critical skill dives, and 2 will be experience dives.

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.

Initial dives will be conducted in shallow mid-water.  The last two experience dives are to be dives at a maximum depth of 160’/48m breathing 25/25 (if shallower than 130'/39m), 21/35 or 18/45, and using 100% or 50% oxygen for decompression.

Course Limits

  • Maximum depth 160’/48m
  • Standard gases: Nitrox 32, 25/25, 21/35, and 18/45
  • Standard decompression gasses:  100% Oxygen or Nitrox 50%
  • 100% Oxygen decompression limited to one single cycle of Oxygen per dive
  • Maximum 30 min of decompression time when using Nitrox 50%
  • No overhead diving

Requirements

  • Minimum age of 21
  • Must have completed UTD Essentials of Technical Diving, UTD Recreational 2 with Doubles Mini, UTD Techreational Diver, or equivalent with assessment
  • Must have at least 75 dives beyond open water certification
  • 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 600 yards / 550m in less than 18 minutes with mask & fins
  • Must be able to swim 50' / 15m on a breath hold without the use of swimming aids such as fins
  • 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
  • One 40 cuft decompression bottle with necessary stage rigging, primary, and secondary stage regulators
  • 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
  • One 40 cuft decompression bottle with necessary stage rigging, primary, and secondary stage regulators
  • 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