Formation plongeur NITROX

Introduction

This tutorial is designed to guide you through the key concepts and procedures necessary for becoming a certified Nitrox diver, following the FFESSM guidelines. Understanding Nitrox and its applications can enhance your diving experience by allowing for longer bottom times and reduced nitrogen absorption.

Step 1: Understand Nitrox Fundamentals

• What is Nitrox?

  • Nitrox is a gas mixture of nitrogen and oxygen, with a higher percentage of oxygen than regular air (which is about 21% oxygen and 79% nitrogen).

• Benefits of Using Nitrox

  • Reduces the risk of decompression sickness.
  • Extends bottom time at certain depths.
  • Provides less nitrogen to absorb during dives.

• Common Nitrox Mixes

  • EAN32 (32% oxygen, 68% nitrogen)
  • EAN36 (36% oxygen, 64% nitrogen)

Step 2: Learn About the Equipment

• Nitrox-Compatible Gear

  • Ensure your regulator and tank are suitable for higher oxygen levels.
  • Use an oxygen analyzer to verify the gas mixture before diving.

• Diving Computer Settings

  • Set your diving computer to the correct Nitrox mix to calculate safe no-decompression limits and ascent rates.

Step 3: Plan Your Dive

• Calculate Maximum Operating Depth

  • Use the formula: MOD = (Percentage of Oxygen - 1) x 1.4 / (Percentage of Nitrogen)
  • Example for EAN32: MOD = (32 - 1) x 1.4 / 68 ≈ 34 meters.

• Establish Dive Profile

  • Plan your dive depth and duration based on the Nitrox mixture and your experience level.
  • Always incorporate safety stops during ascent.

Step 4: Execute the Dive

• Pre-Dive Checklist

  • Double-check your equipment and dive plan.
  • Confirm gas mixture with your dive buddy.

• During the Dive

  • Monitor your depth and time closely.
  • Communicate with your buddy and adhere to the planned profile.

Step 5: Post-Dive Procedures

• Log Your Dive

  • Record the details of your dive, including depth, time, and gas mixture used.

• Review and Reflect

  • Discuss the dive with your buddy to identify any areas for improvement.
  • Consider any physiological effects experienced during the dive.

Conclusion

Becoming a Nitrox diver opens up new opportunities for extended dive times and safer diving experiences. By understanding the fundamentals, planning effectively, and executing dives carefully, you can enhance your underwater adventures. Next, consider enrolling in a formal Nitrox certification course to gain practical experience and knowledge.