Maximizing Your Dive: Factors Affecting Time with a Single Cylinder!

This is the most asked question by non-divers and tourists. It even happens during the preparation phase at the beach or after returning from a dive.

People might have the impression that the tank isn’t very large…

But, inside the Cylinder, there is air compressed to 200 times the normal pressure. It’s not pure oxygen, but rather a high density of air that allows you to stay submerged for extended periods.

Factors such as diving depth and individual breathing rates influence the duration of staying underwater, and there are various aspects to consider…

While some instructors explain these factors in a detailed and thorough manner, let’s simplify things a bit.

On average, it’s around 40 minutes around 40′ (12m) deep!
But there are several elements which can affect the rate at which the air in the Cylinder depletes.

For examples:

• Depth:
  as introduced in this article, the deeper you go the faster the air supply diminishes due to increased density from the surrounding pressure of the depth you’re at.
• Physical activity:
  When you exert more energy, your breathing rate increases. Often referred as air consumption rate.
• Diving experience:
  Beginners often experience higher air consumption rates caused by nervousness. They may also waste unnecessary air trying to adjust their buoyancy.
• Water temperature:
  Breathing rate tends to increase in colder water.

Considering these factors, dive durations can range from under 30 minutes to over 60 minutes. Yet, as a general estimation, an average dive lasts around 40 minutes! Remember not everyone has the same air consumption rate which is based on personal physiology and average depth.

You need to analyze your dive logs and recognizing your breathing patterns. It will help you to figure out how long you can stay underwater based on the selected diving method. This understanding is crucial for your diving sessions! Consider learning how to calculate your air consumption rate also known as RMV, Respiratory Minute Volume and don’t forget to surface with the required reserve. If you plan to go deeper than 60′ (18m) take a deep diving course.