Scuba Diving Pressure Explained for Beginner Scuba Divers

What is the relationship between pressure, volume and density in scuba diving? In this video you will see Scuba Diving Pressure Explained for beginner scuba divers by PADI Platinum Course Director Marcel van den Berg.
When we are scuba diving we will be exposed to more surrounding pressure underwater than when we are on land.
On land, we have the air pressure surrounding us which is 1 bar/ata of pressure at the surface. For every 10 meters, underwater the pressure increases by 1 bar/ata.
At 10 meters we will have 1 bar/ata of water pressure surrounding us, but then we have to add the 1 bar/ata from the surface which gives us 2 bar/ata at 10 meters of depth.
At 30 meters we have 3 bar/ata of water surrounding us and with the extra 1 bar/ata from the surface, we have 4 bar/ata. An easy way to calculate this is by using this formula: Depth / 10 + 1 =
Because the pressure increase it will also increase the density of any air that we have underwater. The density increase is easily found as it is the same number as the bar/ata. So, at 30 meters we have 4 bar/ata which means we have 4 times more density..
Timetable and chapters on Pressure Volume and Density Relationship in Scuba Diving:
00:00 What is the pressure of air?
00:32 What is the pressure under water
01:00 Boyle's law scuba diving
02:46 Volume and density relation scuba diving
Read more about Pressure Volume and Density Relationship in Scuba Diving in the PADI Open Water Diver Manual Answers Chapter 1 - Knowledge Review blog: www.scubadivingtips.net/padi-...
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Marcel van den Berg
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Disclaimer:
Marcel van den Berg is a certified PADI Divemaster (2007), OWSI (2007), MSDT (2007), IDCSI (2008), Master Instructor (2010), and Course Director since 2011. This video and other video’s on the RUclips Channels: Marcel van den Berg and Scuba Diving Tips are for general informational purposes only. Always seek the advice of your Local Law, Scuba Diving Training Organisation, RSTC, and/or your scuba diving professional that is legally teaching/guiding you scuba diving whenever you are in doubt, or following a scuba diving course/guide scuba dive under the supervision of a scuba dive professional from any worldwide dive, industry-recognized scuba diving organization. Marcel (Mario) van den Berg, IDC Koh Tao Thailand, and/or Scuba Diving Tips are not liable or responsible for any advice, trading tips, or any other information, services, or product you obtain through this video or site. Marcel (Mario) van den Berg, IDC Koh Tao Thailand, and/or Scuba Diving Tips are not liable or responsible for any injury, financial loss, failing a scuba diving course, and or loss of certification.
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Scuba Diving Pressure Explained in this Pressure Volume and Density Relationship in Scuba Diving video.

[@MarcelVanDenBerg1]

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[@wyldwiisel9126]

Can I ask we use about 4% of the oxygen in each breath so at 30 meters and we use 4% but there are 3 times the number of oxygen molecules in each breath at 30 meters why are we not breathing at a third of the rate?

[@MarcelVanDenBerg1]

Because it's about the volume as gas is compressed at depth.