What Students Learn (General Standards Summary)

The course typically covers:

1. Equipment & Oxygen Awareness

• How standard scuba equipment interacts with nitrox

• When oxygen-clean equipment is required

• Gas handling and safety concepts

2. Nitrox Physics & Physiology

• Oxygen exposure

• Nitrogen loading

• Partial pressure limits

• Central Nervous System (CNS) and pulmonary oxygen toxicity

3. Gas Analysis & Labeling

• Proper procedures for analyzing nitrox mixtures

• Cylinder labeling requirements

• Fill log documentation

4. Dive Planning

• Using nitrox tables

• Using dive computers with nitrox settings

• Maximum Operating Depth (MOD)

• Equivalent Air Depth (EAD)

Course Structure

TDI Nitrox is commonly offered as:

Academic + Practical Skills

• Classroom/online learning

• Hands-on gas analysis

• Computer/table-based planning exercises

Dives

• No mandatory dives
  (Many shops optionally include 1–2 fun dives using nitrox.)

Certification Limits

Once certified, divers may:

• Use EANx mixtures up to 40% oxygen

• Plan and execute nitrox dives within no-decompression limits

• Analyze tanks and plan MOD/EAD correctly