How is PPO2 calculated?
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You can find it by multiplying the oxygen percentage of the EANx by the absolute pressure (in atmospheres or bar). For example, a diver breathing air (21 percent O2) at 132 feet (5 ata) is breathing a partial pressure of oxygen (PPO2) of 1.05. This would be equivalent to breathing 105 percent oxygen at the surface.
How deep can you dive with trimix?
The commercial diving industry commonly uses heliox in place of trimix. This mixture of helium and oxygen can be used at depths of up to 984 feet (300 m). Any deeper than that requires divers to replace helium with hydrogen.
What does PPO2 mean?
PPO2
| Acronym | Definition |
|---|---|
| PPO2 | Partial Pressure Oxygen |
How deep can you go on 30 nitrox?
The gas mix was developed based on two criteria: a maximum operating depth of 130 feet and a maximum oxygen partial pressure of 1.6 atmospheres absolute (ATA). For years, the NOAA guidelines were the standard when it came to enriched air.
How deep can you dive with 32 nitrox?
121 feet
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.
Why is helium used in trimix?
The main reason for adding helium to the breathing mix is to reduce the proportions of nitrogen and oxygen below those of air, to allow the gas mix to be breathed safely on deep dives.
Why do divers use helium?
Benefits of helium for divers In some dives, both nitrogen and oxygen can induce a state similar to drunkenness. Adding helium to the mix reduces this so divers can think more clearly. Using helium can also mean divers can take fewer stops on their return to the surface, without suffering decompression sickness.
What is the difference between PPO1 and PPO2?
PPO2 is the implementation of OpenAI made for GPU. For multiprocessing, it uses vectorized environments compared to PPO1 which uses MPI. PPO2 contains several modifications from the original algorithm not documented by OpenAI: value function is also clipped and advantages are normalized.
What is PPO2 diving?
PPO2 is the maximum partial pressure of oxygen we want to have during the dive. FO2 is the percentage of oxygen in the mix.
How long can you dive?
Nitrogen is absorbed more readily at deeper depths, making how long can you SCUBA dive dependent on how deep you are. For instance, the time you can spend SCUBA diving at 100 feet is 20 minutes whereas if you limit your dive depth to 35 feet, you could stay for 205 minutes (if you had enough air).
Can you scuba dive every day?
Yes, you can scuba dive every day. As long as you remain with the dive table safety limits or use a dive computer. You have to monitor all your prior dives depth and bottom time, but 18-24 hours is plenty of time to recover between dives. You can even make several dives per day.