TDI Decompression Procedures

TDI Decompression Procedures Diver dptscubaThe TDI Decompression Procedures Course teaches you to plan and execute staged decompression dives to a maximum depth of 45m. This course is usually taught in combination with the TDI Advanced Nitrox course. Students are then able to utilise the benefits of high oxygen gas mixes to accelerate their decompression stops. Upon completion of TDI Advanced Nitrox and Decompression Procedures, divers will possess all the foundation skills required to move on to further technical diving levels.


  • Minimum age 18
  • Minimum certification of SDI Advanced Adventure Diver, Advanced Diver, or equivalent
  • Proof of 25 logged open water dives (bare minimum, I would highly recommend closer to 100 dives)

Course Duration:

As a stand alone course, Decompression Procedures requires 3 full days

  • Day 1: Theory review, dive to check pre-requisite skills and introduce new skills (9-5pm)
  • Day 2: 2 dives focussing on skill development (dependent on boat schedule and previous day performance)
  • Day 3: 1 dive to a maximum depth of 45m including staged decompression (dependent on boat schedule)

When taught in combination with Advanced Nitrox, 4 full days are required, or 3 full days and 2 half days for decompression dives (dependent on boat schedule)

  • Day 1: Theory review, gear appraisal and dry skill session (9-5pm)
  • Day 2: 2 dives focussing on skill development (9-5pm)
  • Day 3: 2 dives to a maximum depth of 40m, no decompression (dependent on boat schedule)
  • Day 4: 1 or 2 dives to a maximum depth of 45m, including staged decompression (dependent on boat schedule)
  • Day 5: 1 dive to a maximum depth of 45m, including staged decompression (dependent on boat schedule)

Course Content:

  • Decompression dive planning including:
    • Decompression gas choices
    • Tables vs. personal dive computers
    • Emergency and contingency planning (equipment failure, omitted decompression, etc.)
  • Decompression diving procedures
    • Equipment selection
    • Pre-dive checks and drills
    • Stress analysis and mitigation
    • Following a decompression schedule
    • Gas switching
    • Team awareness and communication
    • SMB/lift bag deployment
  • Proper trim, buoyancy and finning techniques
  • Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, etc.)
  • Equipment considerations, cylinder labeling, analyzing nitrox mixtures, and gas blending procedures

Training and certification:

Upon successful completion of this course, you will be able to plan and execute decompression dives to 45m wearing twin back gas cylinders and carrying a single decompression gas of up to 100% oxygen, so long as:

  • The diving activities approximate those of training
  • The areas of activities approximate those of training
  • Environmental conditions approximate those of training

As with all courses at DPT Scuba, training is purchased, but certification is earned. This means you must meet ALL the required skills & standards before you will receive a certification card. Additional training to meet these requirements will incur additional costs.

Certification requirements:

  • Demonstrate buoyancy control; ability to hover at fixed position in water column without moving hands or feet.
  • Show good awareness of buddy and other team members through communication, proximity, and team oriented dive practices.
  • Demonstrate the ability to manage free flow from primary regulator in controlled fashion, shut down cycle, and switch to back up regulator.
  • Conduct appropriate safety stop while maintaining neutral buoyancy.
  • Demonstrate the ability to share air with buddy as both recipient and donor in a controlled manner while maintaining position in the water column.
  • Demonstrate correct body position; appropriate trim, such as horizontal/streamlined when moving forward.
  • Demonstrate proper stress analysis with self and dive buddy.
  • Demonstrate the ability to safely and conservatively plan a decompression dive.
  • Demonstrate surface marker buoy deployment from depth.
  • Demonstrate a safe procedure to switch to a decompression gas.
  • Satisfactorily complete the TDI Decompression Procedures course written examination.
  • Complete all open water requirements safely and efficiently.
  • Demonstrate mature, sound judgment concerning dive planning and execution.

For a complete list of skills and standards please visit the official TDI Decompression Procedures Diver page.

How to enroll in this course:

  • Use the contact form to get in touch and we will discuss your training needs and diving goals.
  • Complete the DPT Scuba student registration form and return via email to DPT Scuba
  • Organise a course schedule with DPT Scuba
  • Pay your 20% non-refundable deposit and start your e-Learning online theory.

Cost: $1000 as stand alone course

$1500 when taught in combination with TDI Advanced Nitrox