FO2 is the fraction of O2 in the gas you are breathing. Air has an FO2 of 0.21. It will always be that number at any depth. PO2 is the partial pressure of Oxygen.It changes with depth.
Why do you dive with Nitrox?
The benefit of using nitrox instead of regular gas is that it helps increase your allowed diving time as it offers less nitrogen (and more oxygen) for you to inhale, thus reducing the amount of nitrogen that will quickly dissolve into your body—thereby lengthening your no-decompression limit.
How deep can you dive with 32 Nitrox?
However, when diving on nitrox, the potential for oxygen toxicity lurks well within the depth range of recreational diving: the maximum depth on 32 percent nitrox is 121 feet; on 36 percent nitrox, it’s just over 100 feet. Many divers regularly cruise at these depths and even deeper without giving it a second thought.
What does it mean to decompress when diving?
The decompression of a diver is the reduction in ambient pressure experienced during ascent from depth. … Divers breathing gas at ambient pressure need to ascend at a rate determined by their exposure to pressure and the breathing gas in use.
Is nitrox safer than air?
Nitrox refers to any gas mixture composed (excepting trace gases) of nitrogen and oxygen. … Nitrox is not a safer gas than compressed air in all respects; although its use can reduce the risk of decompression sickness, it increases the risk of oxygen toxicity and fire.
Why Scuba diving is dangerous?
Diving does entail some risk. Not to frighten you, but these risks include decompression sickness (DCS, the “bends”), arterial air embolism, and of course drowning. There are also effects of diving, such as nitrogen narcosis, that can contribute to the cause of these problems.
How deep can a scuba diver dive?
Most recreational scuba divers only dive as deep as 130 feet (40 meters), according to the Professional Association of Diving Instructors.
At what depth do you need Nitrox?
The best application of nitrox is in the 50- to 100-foot range because no-decompression times for dives shallower than 50 feet are often so long that most recreational divers will empty their tank before they run out of dive time.
At what depth does air become toxic?
Oxygen toxicity occurs in most people when the partial pressure of oxygen reaches 1.4 atmospheres or greater, equivalent to slightly over 187 feet (57 meters) depth when breathing air (shallower depths when breathing oxygen concentrations greater than 20%).
At what depth do you need to decompress?
The need to do decompression stops increases with depth. A diver at 6 metres (20 ft) may be able to dive for many hours without needing to do decompression stops. At depths greater than 40 metres (130 ft), a diver may have only a few minutes at the deepest part of the dive before decompression stops are needed.
Can you fart while diving?
Farting is possible while scuba diving but not advisable because: … An underwater fart will shoot you up to the surface like a missile which can cause decompression sickness. The acoustic wave of the underwater fart explosion can disorient your fellow divers.
How does the bends kill you?
If you’ve scuba dived before, then you’ve definitely heard about decompression sickness or “the bends.” When divers ascend too quickly from deep waters, dissolved nitrogen in the blood forms bubbles which can cause excruciating pain in the muscles, paralysis, and in some cases even death.
Why do divers fall backwards?
Scuba divers roll off boats backwards so as not to dislodge their facemask or regulator (the thing they breathe through). … Because if they fell the other way they would fall into the boat.
Why is it dangerous for a diver to take a hot shower?
Exposure to warm or hot water after scuba diving can cause peripheral vasodilation and sudden discharge of even massive quantities of nitrogen bubbles into the venous circulation, with increased risk of DCS. Exposure to warm water (hot bath, showers etc.)
Can you fill a Nitrox tank with air?
Yes. You should do everything possible to ensure they stay O2 clean, and only ever fill them using Oxygen compatible air. Standard scuba air, although very clean and dry, may still contain trace amounts of hydrocarbons and other contaminants.
Is it worth getting Nitrox certified?
So if you’re thinking of doing the Nitrox course then our advice is, do it – it is well worth it. You learn alot, increase your diving knowledge and it will no doubt come in very handy on many of your dives.