0
Scuba
S.C.U.B.A. = Self Contained Underwater Breathing Apparatus. Here is all the information you need to learn and be safe while enjoying this great sport. Explore the last frontier and uncharted depths in the S.C.U.B.A. category.
999 Questions
What is the deepest man can dive to safely without any aids?
The deepest free-dive on record with AIDA International is 88 metres, which was obtained by William Trubridge in 2009 in 3 minutes, 30 seconds.
What kind of people were pearl divers?
pearl divers are people who were trained to swim in deep oceans and also they were mostly Chinese , Indian and white ... <3 :)
Not sure that there is a single definite "inventor". Dive masks of some description have been used since ancient times using polished tortoise shells over the eyes (ie. without enclosing the nose).
When scuba diving became popular in the 1950s, most people simply made their own masks using a lense and either vulcanised rubber or neoprene. Modern masks only really started to develop when manufacturers stepped forward to make masks with finger pockets to pinch the nose to equalise.
I am not aware that anyone has ever held a patent in any country for "inventing" the dive mask.
What causes an oily smell in scuba air tanks?
That's Easy... ITS OIL!! The compressor which filled the tanks has contaminated the cylinders, if you dive with them you risk serious problems!! they need professional cleaning, especially if you are using Nitrox.
Addition
There is another possibility and that is if new hoses are being used at the fill station. The air could pick up an odor going through them. But I would be very concerned it is oil as stated above. The fill station probably knows what is going on to give an odor, but if they cannot explain it then don't use it. As stated above, you may also want to have your tank visually inspected and cleaned in case any oil vapors did get in there. When in doubt, just don't use it.
Depth doesn't really make any difference, but scuba tanks need to be made of strong materials because they are going to be filled with gases which are compressed to 200 times atmospheric pressure or greater. Unless they are strong, they would explode.
Where can you buy a carbon fiber scuba diving tank?
There is at least one area in diving where the weight trade off might be a positive, and that is in rebreather diving. Using even aluminum tanks in some units will make a diver extremely negative when using a wetsuit, especially when necessary trim weights are added to the top of the unit to maintain horizontal trim. This results in much faster use of diluent just to fill the BC just to offset the negative bouyancy. A lightweight carbon fiber tank would be a great benefit. Even if the maximum pressure could not be obtained, as long as the gas volume was sufficient at 3000 psi, this would be an improvement over traditional metal tanks.
This has been talked about before - its a weight trade off. Your tank may be lighter but you'll need to weight down more somewhere else to make up for it.But they do use them in Turkey
Because scuba tanks must be certified to be filled with compressed gas (usually compressed air) they have to be inspected by instruments with currently only inspect metal tanks. The tanks are manufactured in one of two alloys - pressed steel or aluminum. Even if you could find a manufacturer of a carbon fiber tank - you would not be able to get it filled at any SCUBA facility.
why? or how? you have many elements that make scuba diving safe. being aware of your limitations such as amount of time you can dive, the speed of descending and ascending in the water, using the buddy system where you have someone with you under water, a gauge to monitor your air level, you learn certain hand signals to communicate to your buddy in order to understand each other in case your out of air or there is a problem. also knowing weather conditions such as water currents that could drift you from your boat or land. the biggest part of being safe is being aware of your surroundings and well aware of the training material when you get certified.
How long should stay in a hyperbaric chamber for decompression sickness?
It depends entirely on the circumstance - how deep was the dive, how long, how long was the ascent etc etc.
Circle the letter of the best definition for a squeeze?
a. A condition that causes pain and discomfort when the pressure outside an air space of your body is less than the pressure inside an air space.
b. A condition that causes pain an discomfort when the pressure inside an air space of your body is less than the pressure outside an air space.
b would be the right answer.
Addition
Technically all are incorrect. While "B" is the typical answer for an Open Water class, the pressures are virtually the same. This is because an air space will collapse until the pressures equalize. It is actually a volume question that is affected by the external pressure.
Can you use scuba diving as a skill for duke of edinborough?
I don't see why not. The Duke of Edinburgh Award encompasses many different skills and I think Scuba diving would be afab one to do. When I done my gold award I used cross stitch embrodiery for mine!! good luck..
How deep can a human dive without being crushed?
The biggest challenges is oxygen and nitrogen concentration. Oxygen becomes toxic at two atmospheres or about 300 feet since it is 1/5 atmosphere at the surface. Nitrogen is dangerous at lower concentrations if the diver doesn't rise very slowly. It also become like a narcotic about that depth. It is possible to regulate the concentration and use helium and selected gases and you can go down to at least about 1500 feet.
LOW PRESSURE HOSE:
Yes, a low pressure hose. A high pressure hose has a very small diameter opening since it is just used to measure pressure and it is not performing any work. A low pressure hose is used to perform work and has a larger diameter opening so air can move through it.
At what depth is oxygen toxicity harmful to a scuba diver?
The quick answer is that a diver breathing air should descend no deeper than about 218 feet of seawater due to concerns of oxygen toxcity.
Here's the longer answer:
Oxygen can become toxic to a diver as the partial pressure of the gas increases with increasing depth. The point at which this occurs varies based on the metabolism of the individual diver and time at depth. A general rule of thumb is 1.6 atm PPO2. The NOAA Diving Manual quotes the following maximum times at various oxygen partial pressures:
1.6 45 minutes
1.5 120 minutes
1.4 150 minutes
1.3 180 minutes
1.2 210 minutes
It is important to understand that these are not fixed limits. An individual diver's reaction to high pressures of oxygen varies greatly. Most mixed gas rebreathers are set to maintain 1.2 to 1.4 PPO2, allowing for this variability.
To understand what this means to a diver in terms of maximum depth, we need to understand how depth affects the partial pressure of oxygen. The partial pressure of any gas is the total pressure the gas is under, times the fractional percentage of the gas. Each foot of seawater increases the total pressure of the breathing gas by .030303 atm. This means that the total pressure at 33 feet is 2 atm (1 at the surface plus one of water). Total pressure at 66 feet is 2 atm, 99 feet is 3 atm, and so on.
Since air is about 21% oxygen, the PPO2 of air is .21 at the surface, where the total pressure is 1 atm. At a depth of 33 feet of seawater, the total pressure is 2 atm, making the PPO2 (2 X .21) or .42. Accordingly a PPO2 of 1.6 is reached at about 218 feet of sea water. This depth, 218 fsw, is generally considered the maximum safe depth for a diver breathing air.
The same formula can be used for other breathing gases. A diver breathing pure oxygen reaches 1.6 PPO2 at about 20 feet of seawater. A diver breathing Nitrox32, containing 32% oxygen, reaches 1.6 PPO2 at 132 feet.
Note that much of this is moot for most recreational divers. Recreational dive training agencies set a maximum depth of 40 meters (130 feet) for a variety of reasons including avoidance of decompression illness.
What colors are available for scuba gear?
Scuba gear comes in many different colors. Most scuba suites are black but they do make them in other colors some women like pink. You can get your mask and fins in a variety of colors from blue to yellow to red. Scuba gear has come along way and offers multiple choices.
Black Dog Divers is in Tempe, AZ and Andy teaches his diving classes at Sport Chalet in Tempe, AZ. Check out http://www.blackdogdivers.net
What helps a scuba diver sink and float?
Scuba buoyancy is the most fundamental diving skill. Mastering buoyancy control enables a diver to use less effort to maintain his position while diving.
Why should scuba divers be able to dive near coral reefs?
So that the divers are able to take pictures, provide research, and monitor the sea life and the changing temperature
Flickering Eyes Oxygen Toxcicty?
Oxygen toxicity can cause seizures and spasms. That implies to me that flickering eyes may be a symptom of O2 toxicity, but not a common or likely one. While possible, I'd personally look elsewhere for the cause.
Is glass used in deep diving submarines?
Yes, extremely thick plate glass has been used for windows, and glass is also utilized for external cameras.
What is the deepest someone can dive in a wetsuit?
There is no depth limit, so as deep as a diver can stay comfortably warm in that particular suit in the water temperature.
Did jacque cousteau scuba dive?
Jacques Cousteau was very famous in developing early diving technology. He invented equipment and did a lot of marine research especially into underwater habitats. He is famous not only as a diver but as a film maker and marine explorer.
