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Because pressure increases the further down you go. A unpressurized tank would collapse under this weight. Actually, the pressure in the tank is not to prevent it from crushing, but to allow it the diver to breathe. The greater the pressure in the tank, the greater the amount of breathing air you have available. As ambient pressure increases (ie by descending), your lungs require more air to fill them, as you are then breathing compressed air into your lungs. If you tried to breathe atmospheric pressure at depth, you could not fill your lungs. The deeper you go, the harder it is to breathe... Try breathing through a 6ft snorkel to the surface, and see how difficult it is to inhale. Therefore, the tank is pressurised, 1/ to allow you to breathe effortlessly at depth, 2/ to give you more time at depth, and 3/ to keep water out of the tank.

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โˆ™ 2006-04-30 13:43:19
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Q: Why are pressurized tanks required for deep scuba dives?
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Related questions

What happens after using the scuba tank?

A cardinal rule for scuba diving tanks is to never completely empty your scuba diving tank. When planning your scuba dives, it is important that you consider to complete your dive with enough air left within your scuba diving tank.


Where can scuba tanks be bought?

You can buy scuba tanks at the internet page "DiversDirect" or in a special diver store. Or you buy on Ebay a used scuba tank, its cheaper but the scuba tank could be defect or something else.


How is propane stored?

It is stored in pressurized tanks.


Are scuba tanks hydraulic or pneumatic?

SCUBA tanks are metal (usually steel or aluminum) that are filled with compressed air. This is loosely related to a pneumatic system.


How often do scuba tanks need to be inspected?

Scuba tanks need to be visually inspected and need a hydrostatic test done every five years.


Where is it possible to buy a scuba tank?

Used scuba tanks can be found on eBay, but for new equipment, there are brick and mortar "dive shops" that sell tanks and other diving accoutrements. Scuba tanks can be found online at Amazon, and at other online portals that specialize in diving equipment such as LeisurePro.


What do you need to scuba dive?

Mask, fins, snorkel, SCUBA tanks, Buoyancy Control Device and weights. It's also nice to have a wetsuit and dive computer.Also, see the answer in the question "What is the required equipment for scuba diving?"


What is an example sentence for the word tanks?

Hide behind those water tanks. The scuba tanks are filled and ready to go.


What are scuba tanks made of?

They are made usually from Aluminium or steel


Is there a certain temperature to keep tanks for scuba diving?

Under 25


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Scuba divers also wear lead weights on a belt


Mixture of gases for scuba diving tanks compared to normal atmospheric air?

Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.


How do scuba divers sink if they have tanks of compressed air on their backs?

they have weight belts


How does helium affect oxygen tanks for scuba divers?

it doesn't affect the tank


Fluid technologies that make use of air?

Fluid logic.


If there is no oxygen on the moon then how does the man in the moon breathe?

By oxygen tanks - similar to SCUBA divers.


What is the reason for putting tanks in water along with the scuba diver?

so the diver can breath.


How do you refill scuba tank?

Tanks are usually filled from compressors, which simply pump in new gas until they reached the required pressure. Most dive shops have one or more compressors for this purpose. Sometimes tanks are directly filled from other tanks (called 'banks'), but that is usually when you need to fill them at a location where you don't have a compressor.


How often are scuba tanks required to be hydro-statically tested?

Scuba Cylinders must be tested VISUALLY (called a visual test !!) every 2.5 years. They must have a HYDRAULIC test every 5 years (previously 4) (hydraulic is also known as hydrostatic testing)


How many fills will a normal scuba tank fill a 3000 psi paintball air tank?

A Normal scuba tank can usually fill around 50-75 3000 psi tanks. This is assuming though that the compressor is working. That and the tanks are at room temperature.


What are the release dates for How It's Made - 2001 Car Tires Silk Art Conservation Scuba Tanks?

How It's Made - 2001 Car Tires Silk Art Conservation Scuba Tanks was released on: USA: 1 August 2013


What fuel is stored as a liquid in pressurized tanks?

Propane and LNG, liquid natural gas are two of the most common. Hydrogen and oxygen used by NASA is also stored as pressurized liquid.


How do you filling pressure in Breathing appratus?

If you mean Scuba tanks, call a dive shop, if you mean emergency breathing tanks, call your local Fire Co.


What gas is in scuba diving tanks?

air, nitrogen, oxygen, trace gases, and sometimes helium


How does the space suit backpack help astronauts in a space environment breathe?

it has scuba tanks of oxigen.