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FR001Lesson 4 of 830 min

Equalising: the idea

A freediver feels the same squeeze as a scuba diver, with an important difference: the air in the lungs is limited, and it shrinks as you go deeper. Knowing how this works is the foundation for safe depth progress.

Objectives

  • Explain why ears, sinuses and mask need equalising when freediving
  • Describe the idea of equalising gently and early
  • Explain why the lungs shrink with depth and why this is normal

Version 0.1, written by UiDive education team · Draft: awaiting technical review

Important: Independent education, not a diving qualification. Learn to dive with a qualified instructor.