Learning Category
Underwater Science & Your Body
Learner-friendly explanations of pressure, buoyancy, airspaces, light, sound, equalizing, and body temperature.
Lessons
Underwater Science & Your Body
Buoyancy, Pressure & Airspaces
Understand why you float, how pressure changes with depth, and why airspaces need attention during duck dives.
Equalizing Basics
Learn why equalizing matters and compare four common methods for relieving ear and sinus pressure as you descend.
Light, Vision & Sound Underwater
Understand why colors fade, objects look closer than they are, and sound behaves differently once you're underwater.
Why You Get Cold in Water
Understand why your body loses heat faster in water than in air, and why exposure protection matters.