‘air’ Tagged Posts

Tank Diving

tank diving Why do some people use more of the tank than others in scuba diving? If someone nearly emptied the tank, why? First of all, the people calling the contents of the tank "oxygen" are ...

 

tank diving

tank diving
Why do some people use more of the tank than others in scuba diving?

If someone nearly emptied the tank, why?

First of all, the people calling the contents of the tank "oxygen" are probably not scuba divers, because any entry level scuba student knows that pure O2 is only used by tech divers for decompression and only at the correct depths. I'm not trying to insult anyone, but just want you to realize that soeone who actually dives would have a better understanding of what you are asking.

Recreational scuba divers normally breath compressed "air", which has the same O2 content as the air you breath all day, every day, which is 21% Oxygen, 78% Nitrogen, and about 1% "other gasses". NItrox and other mixed gasses are another story, but kind of irrelevent for answering your question.

There is some truth to the statement that a persons size affects their rate of breathing gas consumption, but the biggest factors are...

1. Comfort in the water and learning to relax.
2. Learning the correct breathing pattern.

A normal breathing pattern is to inhale, exhale, and a slight pause before inhaling again. We seem to do this instinctively.

When diving your pattern should be more like... inhale, slight pause, exhale. This pattern we have to learn.

And remember, the slight pause with a nearly full set of lungs is NOT HOLDING YOUR BREATH! That would be dangerous. It's more like a brief hesitation before exhaling to allow a little more oxygen absorption, so don't lock your airway. And keep in mind that your breathing pattern also affects your buoyancy control.

Mostly it just takes time in the water and practice and even a larger person can "outbreath" a smaller person.





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Jump Into Scuba Diving For Fun And Adventure

Scuba diving opens up an adventure that's unimaginable for those with land legs. The wonders that lie beneath the water's surface are amazing. From the oceans and lakes to hidden caves and more, those who scuba see things that can only be imagined from the land.

Those starting out with scuba are not only advised to take classes, they're generally required for rental of tanks, purchase of air and so on. Diving isn't something that's picked up in 20 minutes either. In fact, even experienced divers continue to take lessons or even prefer to teach them to help themselves stay on top of the game. Remember the world underwater does not belong to humans, so a solid understanding of how to survive is vital.

With proper use of diving equipment such as facemasks and air tanks, humans can descend into the world where sharks and whales rule; a place of shipwrecks, corral beds, colorful fish and more. But this world is inhospitable and requires a keen understanding for safety.

Those starting off will find the road to underwater depths takes some time to master. Recreational scuba divers generally stick to depths of 130 feet or less. Training for this is not as intensive as deep water diving since these dives don't generally require decompression stops. When required these stops help the body pressurize to the new environmental conditions. Gravity has a new feel on the body under water than it does on land. Just like riding in an airplane, an adjustment period is required.

For those new to scuba, three different scuba certification agencies might be run into. The Professional Association of Diving, or PADI, is perhaps the best known. Then there are the National Association of Underwater Instructors, or NAUI, and the Scuba Schools International, or SSI. All three provide classes to get divers started on a hobby that's incomparable in adventure.

Basic classes start off with classroom instruction to help students become familiar with the gear. This includes tanks, gauges and so on. Once students are comfortable with the gear, it's time to put it on. Swimming with scuba gear is not like jumping in the water in simply a suit. It's a whole new experience that requires some getting used to. This is where most schools will do "pool dives" to help acclimate students to the gear and its feel underwater.

Pool dives can be done right in a school's own facilities, but oftentimes community pools are used. It is during this part of the lesson that potential scuba divers are born and those who might not find the sport to their liking will begin to discover this. Scuba is a serious sport that requires knowledge and understanding for safety.

Many diving schools will offer starter courses that continue for anywhere between four and eight weeks, depending on teaching style. Each lesson is important before recreational diving is attempted without an instructor present. In addition to diving, they generally include basic first aid and CPR.

After students are familiar with gear, understand how it feels, and are adept at reading its instruments, many schools will offer real dive excursions for beginning divers. These are valuable to attend and they give the first real glimpse of the world that awaits beneath the water.

Scuba diving is not a sport to be jumped into without careful preparation and classroom experience. For those who want to simply undergo recreational training, the depths of 130 feet more than suffice to see some great sights.

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