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Absolutely - air compresses at depth, and because wetsuits are made up of air cells, they compress and lose buoyancy along with the air in the BCD, so divers have to add air while descending. Also, as you breathe air, the tank gets about 6 pounds lighter during the dive, so you need to release air. Finally, as air expands while ascending, you need to let air out.
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How do scuba divers use density?
Divers use substances with high density (ie. lead) to help them sink, and substances with low density (ie. air) to help them float. That way they control their bouyancy.
How do scuba divers alter their average density to float?
Divers usually increase their density by wearing a weight belt (which contains lead weights). Some divers also rely, to a lesser degree, on using steel tanks, which are more dense than aluminum tanks. To decrease their density, divers put air into a Bouyancy Control Device (BCD). Some divers may also control bouyancy by putting air into a drysuit if they wear one. Whereas the increase in density created by the weightbelt is normally fixed, the positive bouyancy provided by the BCD can be varied throughout the dive. Usually a divers net density will decrease over the dive - a diver with a full scuba tank has about 4.5 lbs of extra weight (the weight of the gas) over a diver with an empty scuba tank.
Why are divers limited to depth when at sea?
because of the sea floor
What is the average depth people go when scubadiving?
There is no data regarding the average depth of all dives of all divers. But sport divers typically dive to between 20 and 40 meters on most dives.
How much do scuba diving regulators weigh?
For bouyancy calculations, most regulators are assumed to weigh about 4 lbs. For recreational divers, they only carry one regulator, but technical divers may carry four (or more!) regulators on their doubles and various stage tanks.
Oxygen levels in the sea decrease with depth. how do deep sea divers get there oxygen?
plants
What is the maximum depth limit for Open Water Divers?
PADI -> 60 Ft or 18.3 M
How do scuba divers find out how long they can stay at a certain depth?
we use a chart for that. which helps us calculate how long we can stay in a certain depth. dive planning
What objects are of neutral bouyancy?
The question makes no sense. Objects are buoyant in a surrounding fluid; change the fluid, change their buoyancy.
How do scuba divers dive under water?
The main feature is they use a self contained breathing system under water and they are trained to use the equipment. They also train in controling the bouyancy while under water.
What does bouyancy mean?
bouyancy- force of weight of gas fluids.
What is the purpose of a depth gauge?
The purpose of a depth gauge is to measure the depth of water. It is used by scuba divers to make sure they don't go too deep because the deeper they go the more pressure the water is.
