Scuba

The deeper the diver goes, the higher the pressure is.

The empty weight of a 100 cubic foot steel SCUBA tank is approximately 33lbs.

I asked this question to a professional surgeon once. he told me 'so long as the blood sugar levels are monitored more frequently there is nothing wrong with any normal activity. During sports like diving and swimming energy is used alot quicker so your blood sugar levels may drop quicker, but not in a big way. so long as a normal diet and good safety practice is used i cant see a reason why not to.'

if you have a doctor or consultant ask them. if not ask a scuba company whether they have any rules against diabetics going diving. ---- I would add that this depends on how advanced and controlled your diabetes is. If you're prone to unconsciousness (which is pretty acute), or experience severe seizures, then you can't SCUBA dive. I've had the opportunity to work with advanced diabetics who did in fact experience severe seizure activity, and we were unable to develop a safe profile that would either allow them to safely continue the dive, predict the seizure, or effectively bail out in an emergency, even with a rescuer. Additionally, in cases of disabetes where blood circulation is impaired, there is the potential for a variety of SCUBA related problems, ranging from extremely annoying all the way to fatal. I am not aware of any research having been done on this and, until it is, if you have circulatory failures related to diabetes, I would nix diving until more reesarch has been completed. Cjonb 00:18, 3 Jun 2008 (UTC)

yes I did my check out dives there and it was a great experience!!

When submerged in water, it may get water conatmination. Also the thermal shock, when exhaust is put in water may easily damage the o2 sensor.

Some sensors are vented through cables and some through a special hole. Those with hole, are more likely to get water contamination.

Jaimito el Cartero fue el inventor y el Chompiras con el Peterete ayudaron

A diver can always stay as long as they want if they have enough gas to breath and do any required decompression. But if you are asking what the time limit is on air without having any required decompression time, the answer would be about 5 minutes which includes your descent time or about 3 minutes on the bottom.

Early and often. Divers should equalize immediately after breaking the surface, and frequently while descending. If you let the pressure build up too much, you may not be able to clear until you ascend.

AH!! now we have edited the question!!

Cylinders are not normally coated with Kevlar unless they are made from the lightweight material CARBON FIBRE.

This Kevlar gives the carbon fibre some extra protection and a little more resistance to knocks and bangs.

The carbon/kevlar cylinders (they're not common) are much much lighter than a steel or Alloy cylinder so it saves weight for the diver on their back.

One drawback is that they are inherently buoyant.

Therefore they require an adjustment on weighting, and are not normally used in Technical diving as Stage Cylinders as they Bob up and get in the way.

First, the introduction. (Apologies, but it's important and relevant.) *Note: The fact that the diver is breating compressed air has a profound affect on the body if decompression standards are not met when coming to the surface having spent time at depth. Divers who do not decompress properly can (and have!) died as a result. *Note: The breathing of "regular" compressed gas (air) at "great" depths will increase what is called the partial pressure of the gasses breathed to the point where nitrogen narcosis (the "rapture of the deep") can set in. It will intoxicate and disorient a diver who "goes deep" to the point the he may end up drowning because his cognitive faculties have been compromised and he "spaces out" down there. *Note: The failure of a diver to "equalize" the pressure across his eardrums while descending can result in the rupture of the eardrum(s) and can destroy a diver's hearing in one or both sides. The issues cited are serious. Very much so. They can be life or death. But the wonderful thing is that they are very manageable. The well-developed training and the superior equipment used by divers today make the sport quite safe. The diver controls "99%" of the risk. It's an activity that is doable by most individuals. Most of us risk our lives every day in motor vehicles and we do so without much thought. We have done a personal cost/benefit ratio and have decided to risk getting in the car. We have mastered the basic driving skills and we venture forth having had a little (or a lot) of practice. No problem. That said, let us (finally!) address the question. Other than the issue of decompression, the issue of using "standard" compressed air (as opposed to mixed gas) at "excessive" depths, and the issue of equalization, the body is unaffected on the whole by the compression of the water. Get a balloon and fill it with water to make a water balloon. Be sure to get all the air out. Take the water balloon and put it in a bucket of water and hold it on the bottom. Does it get smaller? No. It is almost completely incompressible. Except for the inside of the lungs (and the interconnection between the airways and the inner ear), the body is the same way. The materials out of which the body is made, and the fact that much of it is water, make it "incompressible" with the exceptions noted. When using air to scuba dive, air taken into the lungs is taken in at "increased" pressure because of the action of the regulator. The increased air pressure will insure that the lungs cannot "collapse" due to the pressure of the water. The lungs and inner ear aside, the body is largely unaffected by water pressure. The diver breathes normally and suffers no ill effects (with the exceptions noted). Some feel for what it is like can be had by going to the bottom of a swimming pool. In the shallows, an individual submerging will feel weightless because buoyancy works against gravity in water. In a "regular" pool, the diver may have to equalize a bit to get on the bottom, but once there, the body is not "crushed" by the water. The lungs are a bit compressed, but that is all. The diver does not notice. The pressure of the water is a factor that is "transparent" in the experience. It goes by will little heed paid to it. (It is water's resistance to the diver's movement which gets all the attention. It is a surreal experience to anyone diving for the first time - as well as returning veterans - to get in the water and become one with the element and its denizens. If an opportunity to dive presents itself, particularly to someone who had not done it, it is a chance to be jumped at. There is nothing like it anywhere. Nothing.

Many Scuba BCD brands receive a lot of positive reviews and offer high quality. Some of these brands for Scuba BCDs are Aqualung, ScubaPro and Sherwood Avid.

yes.

Technically you can scuba dive at any age, as long as you are comfortable doing it. There are however, a few issues that arise with very young scuba divers. Finding scuba equipment for a very small body frame can sometimes be difficult. It also depends on the environment you'll be scuba diving in. Clear waters are much easier than a murky lake or pond. Weak swimmers can also have difficulty navigating waterways with a strong current.

Scuba divers need to decompress after a deep dive so that the oxygen levels in their blood return to normal before returning to the surface. Otherwise they will get the bends. A scuba diver will typically use his or her dive table or computer to figure out how many minutes they must decompress before resurfacing from the dive. Decompression takes place when a diver figures out the amount of time they need to wait at a certain depth under water before they can resurface. They also need to take into account how much air they have left so they can safely wait underneath the water for said period of time. A scuba diver will usually hold onto a drop line and simply breath and wait the allocated amount of time at the prescribed depth and only then safely return to the surface.

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use your log book enter all info into PDC

There is probably a James Bond device that does this but I think you might be referring to something called an underwater shotgun. This is a device that was initially developed to enable people like downed airmen to defend themselves from shark attack but went on to be used by certain spear-fishermen in the late 1960s to kill sharks and rays. They are well illustrated in the book 'the shark hunters'. The device is basically a spear with a large bore shotgun cartridge on the end. The firing mechanism is a trigger on the spear tip. The cartridge was fired when it was pushed onto the prey. I would imagine you would want the firing bit as far away from you as possible, so the spear arrangement would make a lot more sense than a knife.

Fortunately this type of spear fishing is not very popular now, which is a really good thing. Diving is pretty safe sport when you consider the difficult environment, so taking firearms with you is not the most sensible idea, let alone the unsporting outcomes for marine wildlife.

This really depends on who you ask to certify you. However there are some standard excersises that you have to do to pass the course. There is the snorkel clear, there is the mask and mouth clear, second stage breathing device retrieval, safety check, BC check, swim test, basic rescue, and the certification dives. These are the excersises that I did for my certification, but every certification is slightly different.

Oceanography is like geography in the sea. You study the geography of the seabed and the nature of the water, such as salinity, turbidity currents etc.

Although oceanographers may like scuba diving it is unlikely that is will be part of their job because using SCUBA you can only visit a tiny amount of the oceans. Lots of oceanographers are involved in oil exploration for example where the water would be far to deep to reach with scuba.

You display a Divers flag on the support vessel and/or use a surface marker with a flag on it. The international flag is the A or alpha flag, which is a blue and white pennant but in the US it is a red flag with a diagonal white stripe

Consult a doctor

With all medicines it is best to check with your health care professional (GP, pharmacist etc) whether it is safe to dive on.

Having done a quick check on the Internet for the side effects of Topomax it doesn't appear to have any physiological effects which may impede diving BUT it does mention effects on concentration and diving which may make diving unsafe.

For this reason, please check with your health care professional to see if any symptoms you have may affect your diving. Depending what country you live in, you may find it easier to pop in to a pharmacist and ask them rather than making a doctor's appointment. Either way it is always best to understand the effects of medication fully before you undertake activities such as diving.

If you mean Diver Down- the flag used in US water is a red flag with a diagonal white stripe.

Depends on where you are. Often its shrimp. Could be fish feeding on coral. If you are in California in the spring you might be hearing Garabaldi guarding his nest. Sound travels much further under water. What you hear in Tropical and sub tropical waters is fish,shrimp and other forms of sea creatures. In colder fresh water, you do not hear the same volume of sounds .