Why Do We Feel Pressure Underwater?

In our daily lives on land, we live under “Atmospheric Pressure” (1 ATM). However, the moment you gear up and descend into the Red Sea, the rules change. Water is much heavier than air, meaning pressure increases rapidly; for every 10 meters (33 feet) you descend, the pressure increases by 1 ATM.

Fast Facts for the Beginner (Open Water Diver):

• The 10-Meter Rule: At a depth of 10 meters, the total pressure on your body is 2 ATM (1 from the air + 1 from the water).
• Your Ears are the Gauge: The air inside your ears shrinks due to pressure, which is why you feel that “squeeze.” Equalization is the magic key to a comfortable dive.

For Professionals (Dive Master & IDC Candidates):

As a professional or a future instructor, you need to understand the mechanics to explain them clearly to your students:

1. Atmospheric Pressure: The weight of the air column above us.
2. Hydrostatic Pressure: The pressure exerted by the water alone at a specific depth.
3. Absolute (Total) Pressure: The sum of both atmospheric and hydrostatic pressures.
4. Partial Pressure: The core of diving physics and gas behavior (Dalton’s Law), which is crucial for deep and enriched air diving.

Watch the Full Explanation On Our YouTube Channel! 🎥

Sometimes, seeing is believing. I have created a series of educational videos on my YouTube channel, Diving Mentor, where I simplify these concepts.

Whether you are an Open Water Diver looking for a simple explanation or a Dive Master/IDC candidate diving deep into:

• Total and Partial Pressure.
• Gauge Pressure.
• Practical application of Physics in diving.