Scuba

While PADI states three required situations, the answer there is no required situation unless your dive table requires it (i.e. PADI's RDP, or Buhlmann and Boni's Swiss tables). Or the other answer is a safety stop should always be done even though it is not required. I attached 2 articles below on safety stops and lessening your dive risks.

The method is the same, but the formula differs depending on whether you want it in meters or feet.

The easy method in feet is to add .3 atmospheres (ata) every 10 feet (or every 3 meters) and then add a surface atmosphere, so 20 feet would be:

[(.3 x 2) +1] = 1.6 ata

The simple formula for feet is: (Depth + 33)/33

For meters it is: (Depth +10)/10

Divers are taught that the amount of weight that they should wear on their weight belt should be sufficient that with their BCD (bouyancy control device) half full of air, and a full tank of air, they should float at approximately eye level in the water. This means that by venting the air from their BCD they will descend without needing to swim, and by putting additional air in, even with a full tank, they should float comfortably at the surface.

It is to help protect injured muscles and joints

Wear a wet suit with sleeves just so your tattoo won't fade out a little of its color regardless of it is on your arm, hip, head, neck, leg, or anywhere else that i probably won't wonder about. get a tattoo after u go scuba divin You're probably safe, but why take the risk? A fresh tatoo is an open wound, no matter how small or shallow. Why risk your health or your vacation? Get the ink when you get home Your tattoo ought to take about 2-3 weeks to heal (20 days is about perfect) so if you are diving in 3 weeks it won't make any difference. Just make sure that you always put sunscreen on it if it's not covered or it will fade. Until it is healed keep it out of the sun and away from salt water completley - and prolonged periods in fresh water (you're fine in the shower but not in the bathtub). I went diving 24 days after my first tat and had no problems whatsoever.

well, 100 gallons at 3000 psi is 3333 gallons at 90 psi, which is 443 cubic feet, or 110 minutes. However, most air tools are rated for cfm's at atmospheric pressure, which is 14.7 psi at the surface, so 2714 minutes. This is average usage, not continuous, but still quite a long time. Now, if you go down 33 feet, the pressure doubles, so you have to cut the time down - the actually calculation is hazy, as the ambient pressure doubles, but the pressure differential does not - however, you will need to increase the pressure going to the tool by 15 psi for every 30 feet of depth, or else it won't work right.

You just poked thousands of holes into your skin. Some irritation is to be expected.

If it doesn't go away after 4-6 hours, though, you might have an allergic reaction to the ink or you might already be infected. If this is the case, go right back to your tattooist and figure out what's going on.

If it's getting red and puffy each time you wash it or put lotion on it, you're probably using a soap or lotion that has perfumes and dyes in it. These chemicals are bad for new tattoos and for new wounds in general--avoid them.

Also, if you have very fair or sensitive skin, you may be allergic to Sodium Lauryl Sulfate or any of its similarly-named chemical cousins. SLS is found in almost every common household soap, body wash, shampoo, and facial cleanser in America. It functions as a sudsing agent but it's a pretty abrasive skin irritant and can damage your new tattoo. Go to a specialty store like Bath and Body works or a hippy head shop that sells hemp products to find a soap and lotion that don't contain any synthetic chemicals like SLS or PEG-7 Glyceryl and the like.

After your tattoo is healed, you might never go back to Softsoap or Jergins again.

There's all sorts of mathematical equations, but they will give you an approximate only. There are too many variables to give an accurate formula. You can not look only at body weight, but need to take into account Muscle, fat, and bone density. Also wetsuit age/condition and diver's experience levels make a big difference. Best way is to try and see. Proper weighting for a person is proved when they can perform a safety stop (15ft / 5m) with no air in their jacket, and an empty (500psi) tank. I have found that any formula generally overweights people. As a general rule, most divers use about 10% of their body weight. Depending on the thickness of your wetsuit. Myself, wearing a 7/5mm suit, I use 17lbs. of weight. My body weight is 163. So... I recommend 10% of your body weight. (ps. I am also a Scuba Instructor) I too am a Dive Instructor, and feel most divers are overweighted. I've never found a formula that works, and say try it and see. I weigh 190lb, and with a full 7mm and hood, use 14lb. Experience and body makeup make a big difference.

Between seven and eight atmospheres

No.

Years ago, when I took my very first scuba course, the instructors had us walk from the shallow end of a pool to the deep end, wearing a weight belt and breathing through a very long snorkel. Nobody got all the way to the deep end before it became impossible to breathe against the increasing water pressure. It was a very effective exercise in that it taught us very quickly about the effects of ambient water pressure, which doubles in the first 33 feet of sea water.

If the intent of the question is to ask if one can breathe underwater through a garden hose used as a snorkel, the answer is "not deeper than a few feet". In fact, breathing through a snorkel deeper than about two feet is extraordinarily difficult. Your diaphragm simply isn't strong enough to displace the water at deeper depths.

One could use a hose like a garden hose with surface supplied air. The "snuba" systems used at some resorts use this approach. "Scuba", however, is defined as Self Contained Underwater Breathing Apparatus. It's a fair argument that any system which involves a surface gas supply is no longer "self contained".

It is possible to become disoriented underwater if you do not have a point of reference to aid in telling you from up or down: the ground, a boat at the surface, fish, your bubbles, etc. The most readily available orientation aid I've found is your own air. your bubbles will always float toward the water's surface!

Finding a watch for a diver is very important, you need to find good quality. I am not sure where you live, but their are many Fred Meyer's all over the country and Fred Meyer's Jeweler section sells many Dive watches.

You know you are properly weighted for diving if you can achieve neutral buoyancy at the safety stop depth, typically around 15 feet (5 meters), with a nearly empty tank. This means you neither sink nor float when you take a deep breath. Additionally, during ascent, you should be able to maintain a controlled ascent rate without struggling to stay down or rising too quickly. If you find yourself consistently needing to add or remove weight to achieve this balance, adjustments may be necessary.

Yes, but only if it is not form-fitting and is worn loosely.

It may well be possible to learn to dive even if you previously have had blood clots. Blood clots are a natural process and anyone who has cut themselves will have seen it in action. Internal blood clots are obviously more serious and it will depend on several factors such as why you had blood clots, how long has it been since you have suffered from this condition. You may be prescribed drugs that mean your chances of getting a clot are nearly zero but you need to be sure that in taking that drug hyperbaric activities are still allowed.

Prior dive certification, you are usually required to see a doctor and have various health checks. Your doctor is the only person who will be able to tell you if you are fit to dive. Anyone who says otherwise is not in a position to make a comment because they will not have examined you with diving in mind. If you have a condition you feel might mean you can't dive see your doctor before even starting the pool training.

In the United Arab Emirates, pearl divers risked death by drowning and shark attacks, in addition to damaged eardrums, to dive for oysters in the Persian Gulf. The practice was once the major source of income for the majority of inhabitants in the UAE, who would use their share of the proceeds from the pearls to squeak out a living and provide for their families.

Pearl diving was practiced only part of the year, from April to September. During these months, the water was warm enough for divers from Abu Dhabi and Dubai to dive safely. Their boats, known as dhows, were wooden sailing vessels that featured a triangular sail. The most important crew member was the diver himself and the Al Saib, the sailor in charge of pulling him back up to the surface.

And after the discovery of oil pearl diving became less important so no you cannot revive it for the following reasons too:

1. Due to the discovery of oil

2. More jobs in the UAE can now be found

3. It is very risky

4. Not worth it

5. Takes a lot of time

6. Not any one could do it

Diving is unavoidably a dangerous sport but the risks can be minimised by taking proper training with an organisation such as BSAC or PADI, diving to your own limits and comfort levels (i.e. do not push yourself to dive to 50m if you are not trained to do so), be sensible.

As a BSAC member in the UK I only have access to those figures but in 2010 there were 17 fatalities in the UK.

Sorry that I don't have the exact percentage of chance but the chances are very small in relation to the number of people who SCUBA dive.

So take training (if you haven't already) and be sensible and you can reduce the risk.

Increasing the pressure is usually done through uing a compressor which pumps gas in to the cylinder and this increases the pressure.

Yes, an AGA mask covers your complete face and the air is supplied to a connector at the bottom of the mask supplying air to the complete interior of the mask, therefore you would be able to breath just through your nose if you would like.

there are several models, do a GOOGLE search on IST, or OCEAN REEF - NEPTUNE, OCEAN TECHNOLOGIES - MANTIS, or OCEAN TECHNOLOGIES AGA - this is the one you see people using on TV documentaries all the time where they can speak underwater. They simply add a small microphone to the mask. it is also the mask used in most large Aquariums that do live diver presentations from underwater.

There are lots of brilliant diving locations dotted around the world, you've probably come across one already. You may already have ideas about your favourite diving zone, but most dive instructors, recreational divers, and myself recommend the Red Sea, especially Sharm El Sheikh, the best location that there is.

Scuba kit has different names, but here are a few that are most commonly used:

Jacket=BCD/BC

Mouthpiece=regulator/reg

Flippers=fins/flippers

Tank=oxygen tank/air tank/cylinder

Mask=mask

On top of the cylinder=cylinder valve (K,J,Din Yoke etc...)

Wet/dry suit=exposure suit.

Snorkel=snorky/snorkel

if there's more, let me know, these are the ones I thought of on the spot

When you squeeze the sides of the bottle, you increase the pressure inside, causing the water level to rise and displacing the air in the diver. This added pressure compresses the air inside the diver, making it denser than the surrounding water. As a result, the diver becomes negatively buoyant and sinks. Once you release the pressure, the air expands, and the diver rises again.

It is not advisable to dive with an ear infection. A blockage in the ear canal can be painful if you can't properly equalize the air spaces within the ear, and could cause permanent inner ear damage. It is always best to dive only when you are feeling your best. Remember, SCUBA diving is fun and there are many safety features built in to your dive gear, but a lapse of good judgment can ruin an otherwise great dive!

Decompression sickness is caused by reducing the pressure on your body too quickly. Dissolved gasses can turn into bubbles very much like cracking the cap on a soda bottle. The gas bubbles in your blood and joints is very sore and can cause permanent damage or death. Although this usually happens when you come up from depth it can also happen if you go up in the air where the atmospheric pressure is less. Even though most planes have pressurised hulls and the risk of DCS would be very low indeed, flying is generally avoided for a period after diving. In a diving accident where a patient needs helicopter air lift, the helicopter keeps a low altitude for the same reason.